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Optics (Ray)

MHT-CET Physics. Try each one first, then open its answer.

Top 10 MHT-CET PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 7 times: 4 May 2023 S2, 14 May 2024 S2, 22 Apr 2025 S2, 26 Apr 2025 S2, 16 Apr 2026 S2, 17 Apr 2026 S1, 18 Apr 2026 S2. This one: 18 Apr 2026 S2 See all 7 of this type

    140
    Refractive index of a glass convex lens is 1.51.5. The radius of curvature of each of the two surfaces of the lens is 40 cm. The ratio of the power of the lens when immersed in a liquid of refractive index 1.251.25 to that when placed in air is

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  2. Question 2

    This type asked 6 times: 2 May 2023 S2, 3 May 2023 S1, 3 May 2023 S2, 11 May 2024 S1, 19 Apr 2025 S2, 12 May 2026 S2. This one: 12 May 2026 S2 See all 6 of this type

    140
    A convex lens of focal length FF produces a real image ′n′'n' times the size of the object. The image distance is

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  3. Question 3

    This type asked 5 times: 15 May 2023 S2, 14 May 2024 S1, 19 Apr 2025 S1, 11 Apr 2026 S2, 15 Apr 2026 S2. This one: 15 Apr 2026 S2 See all 5 of this type

    140
    The angle of minimum deviation produced by a thin prism in air is δ1\delta_1. What will be the minimum deviation (δ2)(\delta_2) if the prism is immersed in liquid ? [ang=32,anℓ=13]\left[{}^a n_g = \dfrac{3}{2}, {}^a n_\ell = \dfrac{1}{3}\right]

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  4. Question 4

    This type asked 5 times: 2 May 2023 S2, 9 May 2023 S2, 10 May 2023 S2, 16 May 2023 S2, 10 May 2024 S2. This one: 10 May 2024 S2 See all 5 of this type

    2
    Two lenses of power −15 D-15\,D and +5 D+5\,D are in contact with each other. The focal length of the combination is:

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  5. Question 5

    Asked 4 times: 15 May 2023 S2, 14 May 2024 S1, 19 Apr 2025 S1, 11 Apr 2026 S2 See all 4 times it was asked

    140
    A thin prism in air produces the angle of minimum deviation δ\delta. If the prism is immersed in water, the angle of minimum deviation for the same ray is (refractive index of water is 4/34/3 and that of glass prism is 3/23/2)

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  6. Question 6

    This type asked 4 times: 11 May 2023 S1, 16 May 2023 S1, 12 May 2024 S2, 19 Apr 2026 S1. This one: 19 Apr 2026 S1 See all 4 of this type

    140
    A glass slab of thickness 6.06.0 cm is placed on the piece of paper on which an inkdot is marked. By how much distance would an inkdot appear to be raised? The velocity of light in glass is 2×108 ms−12 \times 10^8\ \mathrm{ms^{-1}} and that in air is 3×108 ms−13 \times 10^8\ \mathrm{ms^{-1}}.

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  7. Question 7

    Asked 3 times: 9 May 2024 S1, 11 May 2024 S1, 20 Apr 2026 S1 See all 3 times it was asked

    140
    The prism has refracting angle A. The second refracting surface of the prism is silvered. Light ray falling on first refracting surface with angle of incidence 2A2A, reaches the second surface and returns back through same path due to reflection at the silvered surface. The refractive index of the material of prism is

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  8. Question 8

    Asked 3 times: 3 May 2023 S1*, 3 May 2023 S2*, 19 Apr 2025 S2 (* = numbers or wording changed that year) See all 3 times it was asked

    2
    A convex lens of focal length 13 m\frac{1}{3}\text{ }m forms a real, inverted image twice the size of the object. The distance of the object from the lens is

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  9. Question 9

    This type asked 3 times: May 2022 S1, 19 Apr 2026 S2, 19 May 2026 S1. This one: 19 May 2026 S1 See all 3 of this type

    140
    A ray of light takes time 'tt' to travel a distance 'dd' in air and it travels a distance '4d4d', in time 'TT' in a certain medium. If T=8tT = 8t, the critical angle for the pair of media is [sin⁡(π6)=0.5,sin⁡(π4)=12,sin⁡(π3)=32,sin⁡(π2)=1]\left[\sin\left(\dfrac{\pi}{6}\right) = 0.5, \sin\left(\dfrac{\pi}{4}\right) = \dfrac{1}{\sqrt{2}}, \sin\left(\dfrac{\pi}{3}\right) = \dfrac{\sqrt{3}}{2}, \sin\left(\dfrac{\pi}{2}\right) = 1\right]

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  10. Question 10

    This type asked 3 times: 4 May 2023 S1, 13 May 2024 S2, 14 May 2026 S2. This one: 14 May 2026 S2 See all 3 of this type

    140
    An equilateral prism deviates a ray through 45∘45^\circ for the two angles of incidence differing by 20∘20^\circ. One of the angle of incidence is

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