Wave optics 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 Wave optics with explanations for effective preparation. Practice of MHT CET Physics PYQs including Wave optics questions regularly will improve accuracy, speed, and confidence in the MHT CET 2026 exam.
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MHT CET PYQs for Wave optics with Solutions
1.
What is the frequency of a wave with a wavelength of \( 2 \, \text{m} \) and a velocity of \( 4 \, \text{m/s} \)?- \( 2 \, \text{Hz} \)
- \( 0.5 \, \text{Hz} \)
- \( 1 \, \text{Hz} \)
- \( 4 \, \text{Hz} \)
2.
In a Fresnel biprism experiment, the two positions of lens give separation between the slits as 16 cm and 9 cm, respectively. What is the actual distance of separation?- 12.5 cm
- 12 cm
- 13 cm
- 14 cm
3.
Which of the following generates a plane wavefront ?- $\alpha-rays$
- $\beta-rays$
- $\gamma-rays$
- None of these
4.
Which of the following phenomenon exhibits particle's nature of light ?- Interference
- Diffraction
- Polarisation
- Photoelectric effect
5.
If numerical aperture of a microscope is increased then its- resolving power remains constant
- resolving power becomes zero
- limit of resolution is decreased
- limit of resolution is increased
6.
Two light waves of intensities $'I_1'$ and $'I_2'$ having same frequency pass through same medium at a time in same direction and interfere. The sum of the minimum and maximum intensities is- $(I_1 + I_2)$
- $2 (I_1 + I_2)$
- $(\sqrt{I_1} + \sqrt{I_2})$
- $(\sqrt{I_1} - \sqrt{I_2})$
7.
A diffraction pattern is obtained by making blue light incident on a narrow slit. If blue light is replaced by red light then
- there is no change in diffraction pattern.
- diffraction bands become broader.
- diffraction bands disappear.
- diffraction bands become narrower.
8.
From Brewster�s law, except for polished metallic surfaces, the polarising angle- depends on wavelength and is different for different colours
- independent of wavelength and is different for different colours
- independent of wavelength and is same for different colours
- depends on wavelength and is same for different colours
9.
A light ray passes from air (refractive index \( n_1 = 1 \)) into water (refractive index \( n_2 = 1.33 \)). If the angle of incidence is \( 30^\circ \), what is the angle of refraction in the water?- \( 22^\circ \)
- \( 30^\circ \)
- \( 23.6^\circ \)
- \( 40^\circ \)
10.
The path difference produced by two waves is 3.75 $\mu$m and the wavelength is 5000 $\mathring {A}$. The point is- uncertain
- dark
- partially bright
- bright
11.
Consider the following statements about interference of light.
A – When crest of one wave coincides with crest of another wave at a point, this point is a point of destructive interference.
B – Two coherent sources emit wave of same frequency with constant phase difference.
Choose the correct option from the following.- Both statements A and B are wrong.
- Statement B is correct while statement A is wrong
- Statement A is correct while statement B is wrong.
- Both statements A and B are correct.
12.
In Fraunhofer diffraction pattern, slit width is $0.2\, mm$ and screen is at $2 \,m$ away from the lens. If wavelength of light used is $5000 \, \mathring A $ then the distance between the first minimum on either side of the central maximum is ($\theta$ is small and measured in radian)- $10^{-1} m $
- $10^{-2} m $
- $ 2 \times 10^{-2} m $
- $ 2 \times 10^{-1} m $
13.
A ray of light is incident at polarising angle such that its deviation is $ 24^{\circ} $ , then angle of incidence is- $ 24^{\circ} $
- $ 57^{\circ} $
- $ 66^{\circ} $
- $ 90^{\circ} $
14.
In a Young's double-slit experiment, the distance between the slits is \( 0.2 \, \text{mm} \) and the distance between the screen and the slits is \( 2 \, \text{m} \). If the wavelength of the light used is \( 600 \, \text{nm} \), calculate the distance between the two adjacent bright fringes.- \( 0.3 \, \text{mm} \)
- \( 0.6 \, \text{mm} \)
- \( 1.2 \, \text{mm} \)
- \( 1.5 \, \text{mm} \)
15.
A light wave of wavelength ‘λ’ is incident on a slit of width ‘d’. The resulting diffraction pattern is observed on a screen at a distance ‘D’.If linear width of the principal maximum is equal to the width of the slit, then the distance D is
\(\frac {2λ^2}{d}\)
\(\frac {d}{λ}\)
\(\frac {d^2}{2λ}\)
\(\frac {2λ}{d}\)
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