Ray optics and optical instruments is an important topic in the Physics section in MHT CET exam. Practising this topic will increase your score overall and make your conceptual grip on MHT CET exam stronger.
This article gives you a full set of MHT CET PYQs for Ray optics and optical instruments with explanations for effective preparation. Practice of MHT CET Physics PYQs including Ray optics and optical instruments questions regularly will improve accuracy, speed, and confidence in the MHT CET 2026 exam.
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MHT CET PYQs for Ray optics and optical instruments with Solutions
1.
Two thin lenses have a combined power of +9D. When they are separated by a distance of 20 cm, then their equivalent power becomes +27/5 D. Their individual power (in dioptre) is
- 3,6
- 1,8
- 2,7
- 4,5
2.
A lens has focal length $ f = 20 \, \text{cm} $. What is the power of the lens?- \( +5 \, \text{D} \)
- \( +10 \, \text{D} \)
- \( -5 \, \text{D} \)
- \( -10 \, \text{D} \)
3.
The angle made by incident ray of light with the reflecting surface is called- glancing angle
- angle of incidence
- angle of deviation
- angle of refraction
4.
A concave mirror has a focal length of 15 cm. An object is placed 30 cm from the mirror. What is the image distance?- 30 cm
- 45 cm
- 60 cm
- 20 cm
5.
A ray of light is incident normally on a glass slab of thickness $5\, cm$ and refractive index 1.6. The time taken to travel by a ray from source to surface of slab is same as to travel through glass slab. The distance of source from the surface is- $4\, cm$
- $8 \,cm$
- $12 \,cm$
- $16 \,cm$
6.
When light wave suffers reflection at the interface between air and glass, the change of phase of reflected wave is equal to- zero
- $\pi / 2$
- $\pi$
- $2 \pi$
7.
A convex lens has a focal length of 20 cm. An object is placed 30 cm in front of the lens. What is the image distance from the lens?- \( 12 \, \text{cm} \)
- \( 60 \, \text{cm} \)
- \( 15 \, \text{cm} \)
- \( 30 \, \text{cm} \)
8.
If angle of incidence is twice the angle of refraction in a medium of refractive index $ \mu $ , then angle of incidence is- $ 2 \,cos ^{-1} \frac{\mu}{2} $
- $ 2 \,sin ^{-1} \frac{\mu}{2} $
- $ 2\, cos^{-1} \mu $
- $ 2\, sin ^{-1} \mu $
9.
An object is placed at a distance of 10 cm from a concave mirror of focal length 15 cm. What is the image distance?- \( 30 \, \text{cm} \)
- \( 20 \, \text{cm} \)
- \( 50 \, \text{cm} \)
- \( 60 \, \text{cm} \)
10.
To a bird in air, a fish in water appears to be at 30 cm from the surface. If refractive index of water with respect to air is \(\frac {4}{3}\) ,the real distance of bird from the surface is
- 30 cm
- 50 cm
- 40 cm
- 60 cm
11.
A light ray passes from air (refractive index = 1) into water (refractive index = 1.33). If the angle of incidence is 30°, what is the angle of refraction in water?- \( 22.2^\circ \)
- \( 30.0^\circ \)
- \( 23.0^\circ \)
- \( 17.0^\circ \)
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