CBSE Class 12 Physics HOTs Optics Set C

Please refer to CBSE Class 12 Physics HOTs Optics Set C. Download HOTS questions and answers for Class 12 Physics. Read CBSE Class 12 Physics HOTs for Optics below and download in pdf. High Order Thinking Skills questions come in exams for Physics in Class 12 and if prepared properly can help you to score more marks. You can refer to more chapter wise Class 12 Physics HOTS Questions with solutions and also get latest topic wise important study material as per NCERT book for Class 12 Physics and all other subjects for free on Studiestoday designed as per latest CBSE, NCERT and KVS syllabus and pattern for Class 12

Optics Class 12 Physics HOTS

Class 12 Physics students should refer to the following high order thinking skills questions with answers for Optics in Class 12. These HOTS questions with answers for Class 12 Physics will come in exams and help you to score good marks

HOTS Questions Optics Class 12 Physics with Answers

 UNIT-5

OPTICS

1.When a photon collides with an electron, which of the following characteristics of the photon increases?
2.Which of the following does not support the wave nature of light?
3.The distance travelled by the ray of light during the time octagonal mirror rotates through 900is’L’ if the mirror rotates at N revolution per second, what is the speed of light.
4. A star appear yellow . If it starts accelerating towards earth, how will its colour appears to change.
5.Two points A and B are situated at the same distance from the source of light, but in opposite direction from it.What is the phase difference between the light waves passing
through A and B?
6.When the light is polarized by reflection , what is the angle between reflected and refracted rays.
7. For double refracting crystal the refractive indices , for the ordinary and extraordinary denoted by μo and μe. What is the relation valid along the optical axis of the crystal.
8.What is the angle between planes of electric and magnetic field oscillation in case of light waves?
9.What is the colour of the interference fringe nearest to the white central maximum incase of white light?
10. What happens to the fringe pattern when YDS experiment is performed in water instead of air?
11. A man stands in front of a mirror of special shape. He finds that his image has a very small head, a fat body and legs of normal size. What can we say about the shapes of the three
arts of the mirror?
12. In which direction relative to the normal, does a ray of light bend, when it enters obliquely a medium in which its speed is increased?
13. For the same angle of incidence, the angles of refraction in three different media A,B and C are 15° ,25° and 35°,respectively. In which medium will the velocity of light be minimum?
14. For what angle of incidence, the lateral shift produced by a parallel sided galss slab is maximum?
15. If a plane glass slab is placed on letters of different colours, the red coloured letters appear more raised up. Why?
16. Does refraction in a water tank make apparent depth same throughout?
17. The critical angle for glass-air interface is ic. Will the critical angle for glass-water interface be greater than or less than ic?
18. An air bubble in a jar of water shines brightly. Why?
19.What happens to the shining of diamond if it is dipped in a transparent oil?
20.What type of a lens is a tumbler filled with water?
21.What type of a lens is an air bubble inside water? Give reason also.
22.A lens immersed in a transparent liquid is not visible. Under what condition can this happen?
23. A lens whose radii of curvature are different is forming the image of an object placed on its axis. If the lens is placed with its faces reversed, will the position of the image change?
24.What happens to focal length of a convex lens, when it is immersed in water ?
25.How does the focal length of a convex lens change if monochromatic red light is used instead of violet light?
26.The radii of curvature of both the surfaces of a lens are equal. If one of the surfaces is made plane by grounding, how will the focal length and power change?
27.A glass prism is held in water. How is the angle of minimum deviation affected?
28.A ray of light is normally incident on one face of an equilateral prism.Trace the course of the ray through the prism and emerging from it.
29. What will be the colour of the sky in the absence of atmosphere?
30. Why do clouds appear white?
31. Why do sometimes we observe haloes (rings) round the sun or the moon?
32. Bees can see objects in the ultraviolet light while human beings cannot do so. Why?
33. A chicken wakes up early in the morning and goes to sleep by sunset. Why? OR
Why is a chicken not able to see in the dim light?
35. Why is the focal length of an objective in compound microscope little shorter than the focal length of the eyepiece?
36. You are provided with four lenses of focal length 1 cm, 3cm, 10cm and 100cm. Which two would you prefer for a microscope and which two for a telescope?
37. Can we increase the range of a telescope by increasing the diameter of its objective?
38. A telescope has been adjusted for the relaxed eye. You are asked to adjust it for the least distance of distinct vision, then how will you change the distance between the two lenses?
39. The distances of an object and its real image, measured from the focus of a concave mirror, are a and b respectively. Show that f2 = ab.
40.A ray of light goes from medium 1 to medium 2. velocities of light in the two media are c1 and c2 respectively. For an angle of incidence q in medium 1, the corresponding angle of refraction in medium 2 is q/2.
(i) Which of the two media is optically denser and why?
(ii) Establish the relationship between q, c1 and c2.
41.A beam of light converges at a point on the screen. A plane parallel glass plate is introduced in the path of this converging beam. How will the point of convergence be affected? Draw the relevant ray diagram.
42. A microscope is focused on a dot at the bottom of a beaker. Some oil is poured into the beaker to a height of y cm and it is found necessary to raise the microscope through a vertical
distance of x cm to bring the dot again into focus. Express refractive index of oil in terms of x and y.
43. A ray of light while traveling from a denser to a rarer medium undergoes total reflection. Derive the expression for the critical angle in terms of the speed of light in the respective
media.
44.Explain the twinkling of stars. Why do the planets not show twinkling effect?
45. Only the stars near the horizon twinkle while those overhead do not twinkle. Why?
46.Show that a convex lens produces an N times magnified image when the objet distances, from the lens, have magnitudes (f ± f / N). Here f is the magnitude of the focal length of the
lens. Hence find the two values of object distance, for which a convex lens, of power 2.5D, will produce am image that is four times as large as the object?
47.Use the lens equation to deduce algebraically what you know otherwise from explicit ray diagrams. (a) An object placed within the focus of a convex lens produce a virtual and
enlarged image. (b) A concave lens produces a virtual and diminished image independent of the location of the object.
48. A beam of white light on passing through a hollow prism gives no spectrum. Why?
49. Give reasons for the following observations on the surface of the moon: (i) Sunrise and sunset are abrupt. (ii) Sky appear dark. (iii) A rainbow is never formed.
NUMERICAL PROBLEMS
50. The bottom of a container is a 4.0 cm thick glass. (μ=1.5) slab. The container contains two immiscible liquids And B of depths 6.0 cm and 8.0 cm respectively. What is the apparent
position of a scratch on the outer surface of the bottom of the glass slab when viewed through the container? Refractive indices of A and B are 1.4 and 1.3 respectively.
51. The refractive index of water is 4/3. Obtain the value of the semivertical angle of the cone within which the entire outside view would be confined for a fish under water. Draw an
appropriate ray diagram.
52. A lens forms a real image of an object. The distance of the object to the lens is 4 cm and the distance of the image from the lens is v cm. The given graph shows the variation of v with
u. (i) What is the nature of the lens? (ii) Using this graph, find the focal length of this lens.
53. A ray of light passes through an equilateral glass prism, such that the angle of incidence is equal to the angle of emergence. If the angle of emergence is ¾ times the angle of the prism,
Calculate the refractive index of the glass prism.
54. State the conditions which must be satisfied for two light sources to be coherent.
55. Two independent light sources cannot act as coherent sources. Why?
56. No interference pattern is detected when two coherent sources are infinitely close to one another. Why?
57. If the path difference produced due to interference of light coming out of two slits for yellow colour of light at a point on the screen be 3l/2, what will be the colour of the fringe at
the point. Give reason also.
58. What happens to the interference pattern if the phase difference between the two sources varies continuously?
59. Radiowaves diffract pronouncedly around the buildings, while light waves, which are e.m. waves do not why?
60. Coloured spectrum is seen, when we look through a muslin cloth. Why.
 
SHORT ANSWER QUESTIONS
61. How is a wavefront different from a ray? Draw the geometrical shape of the wavefronts when (i) light diverges from a point source, and (ii) light emerges out of convex lens when a
point source is placed at its focus.
62. In a young’s double slit experiment, the position of the first fringe coincides with S1 and
S2 respectively. What is the wavelength of light?
63. Draw the diagram showing intensity distribution of light on the screen for diffraction of light at a single slit. How is the width of central maxima affected on increasing the
(i) Wavelength of light used (ii) width of the slit/
What happens to the width of the central maxima if the whole apparatus is immersed in water and why?
64. What two main changes in diffraction pattern of single slit will you observe when the monochromatic source of light is replaced by a source of white light?
65. Explain with reason, how the resolving power of a compound microscope will change when (i) frequency of the incident light on the objective lens is increased. (ii) focal length of the objective lens is increased, and (iii) aperture of the objective lens is increased.
66. The critical angle between a given transparent medium and air is denoted by ic, A ray of light in air medium enters this transparent medium at an agle of incidence equal to the
polarizing angle(ip). Deduce a relation for the angle of refraction (rp) in terms of ic.
 
NUMERICAL QUESTIONS
67. Two Sources of Intensity I and 4I are used in an interference experiment. Find the intensity at points where the waves from two sources superimpose with a phase difference (i)
zero (ii) p/2 (iii) p.
68. In a two slit experiment with monochromatic light, fringes are obtained on a screen placed at some distance D from the slits. If the screen is moved 5 x 10-2 m towards the slits,
the charge in fringe width is 3 x 10 -5 m. If the distance between the slit is 10-3 m . calculate the wavelength of the light used.
69. A narrow monochromatic beam of light of intensity I is incident a glass plate. Another identical glass plate is kept close to the first one and parallel to it. Each plate reflects 25% ofthe incident light and transmits the reaming. Calculate the ratio of minimum and maximum intensity in the interference pattern formed by the two beams obtained after reflection from
each plate.
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CBSE Class 12 Physics Optics HOTS

We hope students liked the above HOTS for Optics designed as per the latest syllabus for Class 12 Physics released by CBSE. Students of Class 12 should download the High Order Thinking Skills Questions and Answers in Pdf format and practice the questions and solutions given in above Class 12 Physics  HOTS Questions on daily basis. All latest HOTS with answers have been developed for Physics by referring to the most important and regularly asked topics that the students should learn and practice to get better score in school tests and examinations. Studiestoday is the best portal for Class 12 students to get all latest study material free of cost.

HOTS for Physics CBSE Class 12 Optics

Expert teachers of studiestoday have referred to NCERT book for Class 12 Physics to develop the Physics Class 12 HOTS. If you download HOTS with answers for the above chapter daily, you will get higher and better marks in Class 12 test and exams in the current year as you will be able to have stronger understanding of all concepts. Daily High Order Thinking Skills questions practice of Physics and its study material will help students to have stronger understanding of all concepts and also make them expert on all critical topics. You can easily download and save all HOTS for Class 12 Physics also from www.studiestoday.com without paying anything in Pdf format. After solving the questions given in the HOTS which have been developed as per latest course books also refer to the NCERT solutions for Class 12 Physics designed by our teachers

Optics HOTS Physics CBSE Class 12

All HOTS given above for Class 12 Physics have been made as per the latest syllabus and books issued for the current academic year. The students of Class 12 can refer to the answers which have been also provided by our teachers for all HOTS of Physics so that you are able to solve the questions and then compare your answers with the solutions provided by us. We have also provided lot of MCQ questions for Class 12 Physics in the HOTS so that you can solve questions relating to all topics given in each chapter. All study material for Class 12 Physics students have been given on studiestoday.

Optics CBSE Class 12 HOTS Physics

Regular HOTS practice helps to gain more practice in solving questions to obtain a more comprehensive understanding of Optics concepts. HOTS play an important role in developing an understanding of Optics in CBSE Class 12. Students can download and save or print all the HOTS, printable assignments, and practice sheets of the above chapter in Class 12 Physics in Pdf format from studiestoday. You can print or read them online on your computer or mobile or any other device. After solving these you should also refer to Class 12 Physics MCQ Test for the same chapter

CBSE HOTS Physics Class 12 Optics

CBSE Class 12 Physics best textbooks have been used for writing the problems given in the above HOTS. If you have tests coming up then you should revise all concepts relating to Optics and then take out print of the above HOTS and attempt all problems. We have also provided a lot of other HOTS for Class 12 Physics which you can use to further make yourself better in Physics.

Where can I download latest CBSE HOTS for Class 12 Physics Optics

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Can I download the HOTS of Optics Class 12 Physics in Pdf

Yes, you can click on the link above and download topic wise HOTS Questions Pdfs for Optics Class 12 for Physics

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Yes, the HOTS issued by CBSE for Class 12 Physics Optics have been made available here for latest academic session

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There is no charge for the HOTS and their answers for Optics Class 12 CBSE Physics you can download everything free

What does HOTS stand for in Class 12 Physics Optics

HOTS stands for "Higher Order Thinking Skills" in Optics Class 12 Physics. It refers to questions that require critical thinking, analysis, and application of knowledge

How can I improve my HOTS in Class 12 Physics Optics

Regular revision of HOTS given on studiestoday for Class 12 subject Physics Optics can help you to score better marks in exams

Are HOTS questions important for Optics Class 12 Physics exams

Yes, HOTS questions are important for Optics Class 12 Physics exams as it helps to assess your ability to think critically, apply concepts, and display understanding of the subject.