Practice BITSAT Physics Ray Optics and Optical Instruments MCQs provided below. The MCQ Questions for Full Syllabus Ray Optics and Optical Instruments Physics with answers and follow the latest BITSAT/ NCERT and KVS patterns. Refer to more Chapter-wise MCQs for BITSAT 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 review the 50 questions and answers to strengthen understanding of core concepts in Ray Optics and Optical Instruments
Ray Optics and Optical Instruments MCQ Questions Full Syllabus Physics with Answers
Question: Two plano-concave lenses (1 and 2) of glass of refractive index 1.5 have radii of curvature 25 cm and 20 cm. They are placed in contact with their curved surface towards each other and the space between them is filled with liquid of refractive index 4/3. Then the combination is
- a) Convex lens of focal length 70 cm
- b) Concave lens of focal length 70 cm
- c) Concave lens of focal length 66.6 cm
- d) Convex lens of focal length 66.6 cm
Answer: Concave lens of focal length 66.6 cm
Question: On a hypotenuse of a right angle prism (30° – 60° – 90°) of refractive index 1.50, a drop of liquid is placed as shown in figure. Light is allowed to fall normally on the short face of the prism. In order that the ray of light may get totally reflected, the maximum value of refractive index is :
- a) 1.30
- b) 1.47
- c) 1.20
- d) 1.25
Answer: 1.30
Question: A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options best describe the image formed of an object of height 2 cm placed 30 cm from the lens?
- a) Virtual, upright, height = 1 cm
- b) Virtual, upright, height = 0.5 cm
- c) Real, inverted, height = 4 cm
- d) Real, inverted, height = 1cm
Answer: Real, inverted, height = 4 cm
Question: For the angle of minimum deviation of a prism to be equal to its refracting angle, the prism must be made of a material whose refractive index :
- a) lies between √2 and 1
- b) lies between 2 and √2
- c) is less than 1
- d) is greater than 2
Answer: lies between 2 and √2
Question: A lens having focal length f and aperture of diameter d forms an image of intensity I. Aperture of diameter 
in central region of lens is covered by a black paper. Focal length of lens and intensity of image now will be respectively;
- a)
- b)
- c)
- d)
Answer:
Question: A ray parallel to principal axis is incident at 30° from normal on concave mirror having radius of curvature R. The point on principal axis where rays are focussed is Q such that PQ is
- a)
- b)
- c)
- d)
Answer:
Question: A planoconvex lens fits exactly into a planoconcave lens. Their plane surface are parallel to each other. If the lenses are made of different materials of refractive indices μ1 & μ2 and R is the radius of curvature of the curved surface of the lenses, then focal length of combination is
- a)
- b)
- c)
- d)
Answer:
Question: The magnifying power of a telescope is 9. When it is adjusted for parallel rays, the distance between the objective and the eye piece is found to be 20 cm. The focal length of lenses are
- a) 18 cm, 2 cm
- b) 11 cm, 9 cm
- c) 10 cm, 10 cm
- d) 15 cm, 5 cm
Answer: 18 cm, 2 cm
Question: When light is refracted, which of the following does not change ?
- a) Wavelength
- b) Frequency
- c) Velocity
- d) Amplitude
Answer: Frequency
Question: A Convex lens of crown glass (μ = 1.525) will behave as a divergent lens if immersed in
- a) water (μ = 1.33)
- b) in a medium of μ = 1.525
- c) carbon disulphide (μ = 1.66)
- d) it cannot act as a divergent lens
Answer: carbon disulphide (μ = 1.66)
Question: Wavelength of light used in an optical instrument are λ1 = 4000Å and λ2 = 5000 Å, then ratio of their respective resolving powers (corresponding to λ1 and λ2) is
- a) 16 : 25
- b) 9 : 1
- c) 4 : 5
- d) 5 : 4
Answer: 5 : 4
Question: A thin convergent glass lens (μg = 1.5) has a power of + 5.0 D. When this lens is immersed in a liquid of refractive index m, it acts as a divergent lens of focal length 100 cm. The value of m must be
- a) 4/3
- b) 5/3
- c) 5/4
- d) 6/5
Answer: 5/3
Question: A vessel of depth 2d cm. is half filled with a liquid of refractive index μ1 and the upper half with a liquid of refractive index μ2. The apparent depth of the vessel seen perpendicularly is –
- a)
- b)
- c)
- d)
Answer:
Question: A plano-convex lens of focal length 30 cm has its plane surface silvered. An object is placed 40 cm from the lens on the convex side. The distance of the image from the lens is
- a) 18 cm
- b) 24 cm
- c) 30 cm
- d) 40 cm
Answer: 24 cm
Question: Time taken to cross a 4 mm window glass of refractive index 1.5 will be-
- a) 2 × 10–8 sec
- b) 2 × 108 sec
- c) 2 × 10–11 sec
- d) 2 × 1011 sec
Answer: 2 × 10–11 sec
Question: A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is 4/3 and the fish is 12 cm. below the surface, the radius of this circle in cm is –
- a) 36 √5
- b) 4 √5
- c) 36 √7
- d) 36/ √7
Answer: 36/ √7
Question: An air bubble under water shines brightly because of the phenomenon of :
- a) Diffraction
- b) Dispersion
- c) Interference
- d) Total internal reflection
Answer: Total internal reflection
Question: A vessel is half filled with a liquid of refractive index μ. The other half of the vessel is filled with an immiscible liquid of refrative index 1.5 μ. The apparent depth of the vessel is 50% of the actual depth. Then μ is
- a) 1.4
- b) 1.5
- c) 1.6
- d) 1.67
Answer: 1.67
Question: A biconvex lens has a radius of curvature of magnitude 20 cm. Which one of the following options best describe the image formed of an object of height 2 cm placed 30 cm from the lens?
- a) Virtual, upright, height = 1 cm
- b) Virtual, upright, height = 0.5 cm
- c) Real, inverted, height = 4 cm
- d) Real, inverted, height = 1cm
Answer: Real, inverted, height = 4 cm
Question: When light is refracted, which of the following does not change ?
- a) Wavelength
- b) Frequency
- c) Velocity
- d) Amplitude
Answer: Frequency
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MCQs for Ray Optics and Optical Instruments Physics Full Syllabus
Students can use these MCQs for Ray Optics and Optical Instruments to quickly test their knowledge of the chapter. These multiple-choice questions have been designed as per the latest syllabus for Full Syllabus Physics released by BITSAT. Our expert teachers suggest that you should practice daily and solving these objective questions of Ray Optics and Optical Instruments to understand the important concepts and better marks in your school tests.
Ray Optics and Optical Instruments NCERT Based Objective Questions
Our expert teachers have designed these Physics MCQs based on the official NCERT book for Full Syllabus. We have identified all questions from the most important topics that are always asked in exams. After solving these, please compare your choices with our provided answers. For better understanding of Ray Optics and Optical Instruments, you should also refer to our NCERT solutions for Full Syllabus Physics created by our team.
Online Practice and Revision for Ray Optics and Optical Instruments Physics
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