Refer to JEE Physics Ray Optics and Optical Instruments MCQs Set A provided below available for download in Pdf. The MCQ Questions for Full Syllabus Physics with answers are aligned as per the latest syllabus and exam pattern suggested by JEE (Main), NCERT and KVS. Multiple Choice Questions for Ray Optics and Optical Instruments are an important part of exams for Full Syllabus Physics and if practiced properly can help you to improve your understanding and get higher marks. Refer to more Chapter-wise MCQs for JEE (Main) Full Syllabus Physics and also download more latest study material for all subjects
MCQ for Full Syllabus Physics Ray Optics and Optical Instruments
Full Syllabus Physics students should refer to the following multiple-choice questions with answers for Ray Optics and Optical Instruments in Full Syllabus.
Ray Optics and Optical Instruments MCQ Questions Full Syllabus Physics with Answers
Question: Digital movie projectors work on the principle of
- a) Reflection from micromirrors
- b) Dispersion from thin prisms
- c) Refraction from thin lenses
- d) Total internal reflection from optical fibres
Answer: Reflection from micromirrors
Question: Day and night settings for rearview mirrors uses
- a) Thick wedge shaped mirrors
- b) Concave mirrors
- c) Thin mirrors
- d) Convex mirrors
Answer: Thick wedge shaped mirrors
Question: When a beam of light is incident on a plane mirror, it is found that a real image is formed. The incident beam must be
- a) Converging
- b) Diverging
- c) Parallel
- d) Formation of real image by a plane mirror is impossible
Answer: Converging
Question: An object is placed symmetrically between two plane mirrors, inclined at an angle of 72°, then the total number of images observed is
- a) 4
- b) 5
- c) 2
- d) Infinite
Answer: 4
Question: A person 1.6 m tall is standing at the centre between two walls three metre high. What is the minimum size of a plane mirror fixed on the wall in front of him, if he is to see the full height of the wall behind him?
- a) 1 m
- b) 0.8 m
- c) 1.5 m
- d) 2.3 m
Answer: 1 m
Question: While capturing solar energy for commercial purposes we use
- a) Parabolic mirrors
- b) Plane mirrors
- c) Convex mirrors
- d) Concave mirrors
Answer: Parabolic mirrors
Question: A convex mirror is used to form an image of a real object. Then mark the wrong statement
- a) The image is real
- b) The image is diminished in size
- c) The image lies between the pole and focus
- d) The image is erect
Answer: The image is real
Question: A concave mirror of focal length f produces an image n times the size of the object. If the image is real then the distance of the object from the mirror is
- a)
- b)
- c) (n – 1) f
- d) (n + 1) f
Answer:
Question: A convex mirror has a focal length f. A real object is placed at a distance f in front of it, from the pole. It produces an image at
- a) f/2
- b) f
- c) Infinity
- d) 2f
Answer: f/2
Question: An object placed in front of a concave mirror of focal length 0.15 m produces a virtual image, which is twice the size of the object. The position of the object with respect to the mirror is
- a) –7.5 cm
- b) –8.5 cm
- c) –6.5 cm
- d) –5.5 cm
Answer: –7.5 cm
Question: When a light ray from a rarer medium is refracted into a denser medium, its
- a) Speed decreases, wavelength decreases
- b) Speed decreases, wavelength increases
- c) Speed increases, wavelength increases
- d) Speed increases, wavelength decreases
Answer: Speed decreases, wavelength decreases
Question: A narrow, paraxial beam of light is converging towards a point I on a screen. A plane parallel plate of glass of thickness t, and refractive index μ is introduced in the path of the beam. The convergence point is shifted by
- a)
- b)
- c)
- d)
Answer:
Question:
- a) 32 cm above the surface
- b) 18 cm above the surface
- c) 24 cm above the surface
- d) 36 cm above the surface
Answer: 32 cm above the surface
Question: A ray of light strikes a glass plate at an angle 60o. If the reflected and refracted rays are perpendicular to each other, the index of refraction of glass is
- a)
- b)
- c) 3/2
- d) 1/2
Answer:
Question:
- a) 4 cm
- b) 3 cm
- c) 4/3 cm
- d) 1 cm
Answer: 4 cm
Question:
- a) sin–1 4/5
- b) sin–1 3/4
- c) sin–1 2/5
- d) sin–1 1/2
Answer: sin–1 4/5
Question: Which of the following phenomenon of light forms a rainbow?
- a) Reflection as well as refraction
- b) Refraction
- c) Reflection of light
- d) Total internal reflection
Answer: Reflection as well as refraction
Question: Which of the following is possible application of fibre optics?
- a) All of the above
- b) High speed internet traffic
- c) Endoscopy
- d) Radio, TV & Telephone signals
Answer: All of the above
Question: An object is placed at a distance of f/2 from a convex lens. The image will be
- a) At one of the foci, virtual and double its size
- b) At 3f/2, real and inverted
- c) At f, real and inverted
- d) At 2f, virtual and erect
Answer: At one of the foci, virtual and double its size
Question: The least distance between a point object and its real image formed by a convex lens of focal length F is
- a) 4 F
- b) 3 F
- c) 2 F
- d) Greater than 4 F
Answer: 4 F
More Questions..................................
Question: The plane faces of two identical plano-convex lenses, each having focal length of 40 cm, are placed against each other to form a usual convex lens. The distance from this lens at which an object must be placed to obtain a real, inverted image with magnification '–1' is
- a) 40 cm
- b) 80 cm
- c) 20 cm
- d) 160 cm
Answer: 40 cm
Question: Two thin lenses of focal lengths 20 cm and –20 cm are placed in contact with each other. The combination has a focal length equal to
- a) Infinite
- b) 50 cm
- c) 60 cm
- d) 10 cm
Answer: Infinite
Question: If in a plano-convex lens, radius of curvature of convex surface is 10 cm and the focal length of lens is 30 cm, the refractive index of the material of the lens will be
- a) 1.33
- b) 3
- c) 1.66
- d) 1.5
Answer: 1.33
Question:
- a)
- b)
- c)
- d)
Answer:
Question: The diameter of aperture of a plano-convex lens is 6 cm and its maximum thickness is 3 mm. If the velocity of light in the material of the lens is 2 × 108 m/s, its focal length is
- a) 30 cm
- b) 60 cm
- c) 15 cm
- d) 10 cm
Answer: 30 cm
Question:
- a) 1 : 1 : 1
- b) 2 : 1 : 2
- c) 1 : 2 : 3
- d) 1 : 2 : 1
Answer: 1 : 1 : 1
Question:
- a)
- b)
- c)
- d)
Answer:
Question: A concave lens of focal length f produces an image (1/x) of the size of the object. The distance of the object from the lens is
- a) (x – 1) f
- b) (x + 1)f
- c) {(x – 1)/x}f
- d) {(x + 1)/x}f
Answer: (x – 1) f
Question:
- a) 5/3
- b) 8/3
- c) 3/4
- d) 4/3
Answer: 5/3
Question: In case of displacement method of lenses, the product of magnification in both cases is
- a) 1
- b) 2
- c) Zero
- d) Infinite
Answer: 1
Question:
- a)
- b)
- c)
- d)
Answer:
Question:
- a) 12
- b) 40
- c) 30
- d) 20
Answer: 12
Question:
- a) 12 cm
- b) 6 cm
- c) 10 cm
- d) 8 cm
Answer: 12 cm
Question:
- a)
- b)
- c)
- d) None of these
Answer:
Question:
- a) 90°
- b) 45°
- c) 60°
- d) 30°
Answer: 90°
Question:
- a) 45°
- b) 30°
- c) 60°
- d) 75°
Answer: 45°
Question:
- a)
- b)
- c)
- d)
Answer:
Question: A person can see clearly only up to a distance of 25 cm. He wants to read a book placed at a distance of 50 cm. What kind of lens does he require for this purpose and what must be its power?
- a) Concave, – 2.0 D
- b) Convex, + 2.0 D
- c) Concave, – 1.0 D
- d) Convex, + 1.5 D
Answer: Concave, – 2.0 D
Question: An astronomical telescope has an objective of focal length 100 cm and an eye piece of focal length 5 cm. The final image of a star is seen 25 cm from the eyepiece. The magnifying power of the telescope is
- a) 24
- b) 26
- c) 22
- d) 20
Answer: 24
Question: When a telescope is adjusted for normal vision, the distance of the objective from the eye-piece is found to be 80 cm. The magnifying power of the telescope is 19. What are the focal lengths of the lenses?
- a) 76 cm, 4 cm
- b) 50 cm, 30 cm
- c) 40 cm, 40 cm
- d) 61 cm, 19 cm
Answer: 76 cm, 4 cm
Question: The focal lengths of the objective and eye lens of a telescope are respectively 200 cm and 5 cm. The maximum magnifying power of the telescope will be
- a) – 48
- b) – 40
- c) – 60
- d) – 100
Answer: – 48
Question: A convex lens forms a real image of a point object at a distance of 50 cm from the convex lens. A concave lens is placed 10 cm behind the convex lens on the image side. On placing a plane mirror on the image side and facing the concave lens, it is observed that the final image now coincides with the object itself. The focal length of the concave lens is
- a) 40 cm
- b) 25 cm
- c) 20 cm
- d) 50 cm
Answer: 40 cm
Question: A convex lens of focal length 100 cm and a concave lens of focal length 10 cm are placed coaxially at a separation of 90 cm. If a parallel beam of light is incident on convex lens, then after passing through the two lenses the beam
- a) Remains parallel
- b) Disappears
- c) Diverges
- d) Converges
Answer: Remains parallel
Question:
- a) 40 cm
- b) 80 cm
- c) 20 cm
- d) 10 cm
Answer: 40 cm
Question: A driving mirror consists of a cylindrical mirror of radius of curvature 10 cm and the length over the curved surface is 10 cm. If the eye of the driver be assumed to be at a great distance from the mirror, then field of view in radian is
- a) 2.0
- b) 4.0
- c) 3.0
- d) 5.0
Answer: 2.0
Question: Which of the following statements is correct?
- a) All of these
- b) When the moon is near the horizon it appears bigger. This is due to optical illusion
- c) During hot summer days, the trees and other tall objects seem to be quivering because the density of air changes in an irregular way
- d)
Answer: All of these
Question:
- a) 1.732
- b) 1.866
- c) 1.5
- d) 1.414
Answer: 1.732
Question: A short linear object of length l lies along the axis of a concave mirror at a distance u from it. If v is the distance of image from the mirror then size of the image is
- a)
- b)
- c)
- d)
Answer:
Question:
- a)
- b)
- c)
- d)
Answer:
Question: In optical fibre, refractive index of inner part is 1.68 and refractive index of outer part is 1.44. The numerical aperture of the fibre is
- a) 0.8653
- b) 0.7653
- c) 0.6653
- d) 0.5653
Answer: 0.8653
Question: Compare the dispersive powers of two prisms if one of them deviates the blue and red rays through 10° and 6° respectively and the second prism through 8° and 4.5°
- a) 0.89
- b) 0.99
- c) 0.79
- d) 0.69
Answer: 0.89
Question: A thin prism of angle 6° made of glass of refractive index 1.5 is combined with another prism made of glass of refractive index 1.75 to produce dispersion without deviation. Then the angle of the second prism is
- a) 4°
- b) 9°
- c) 5°
- d) 7°
Answer: 4°
Question: In a medium of refractive index 1.6 and having a convex surface has a point object in it at a distance of 12 cm from the pole. The radius of curvature is 6 cm. Locate the image as seen from air
- a) A virtual image at 30 cm
- b) A virtual image at 4.28 cm
- c) A real image at 30 cm
- d) A real image at 4.28 cm
Answer: A virtual image at 30 cm
Question: A point object is situated at a distance of 36 cm from the centre of the sphere of radius 12 cm and refractive index 1.5. Locate the position of the image due to refraction through sphere
- a) Both
- b) 36 cm from the centre
- c) 24 cm from the surface
- d) 24 cm from the centre
Answer: Both
Question: A denser medium of refractive index 1.5 has a concave surface of radius of curvature 12 cm. An object is situated in the denser medium at a distance of 9 cm from the pole. Locate the image due to refraction in air.
- a) A virtual image at 4.8 cm
- b) A virtual image at 8 cm
- c) A real image at 8 cm
- d) A real image at 4.8 cm
Answer: A virtual image at 4.8 cm
Question: A light ray is travelling from air to glass. The reflected and refracted rays are perpendicular to each other. If the angle of incidence in air is i the refractive index of glass is
- a) tan i
- b) cot i
- c) cos i
- d) sin i
Answer: tan i
Question:
- a)
- b)
- c)
- d)
Answer:
Question:
- a) 46º
- b) 47º
- c) 45º
- d) 60º
Answer: 46º
Question:
- a) 15º
- b) 60º
- c) 30º
- d) 105º
Answer: 15º
Question:
- a)
- b)
- c)
- d)
Answer:
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MCQs for Ray Optics and Optical Instruments Physics Full Syllabus
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