Practice Wave Optics Multiple Choice Questions with Answers Quiz-3

Q.1.

The bending of light as it enters a new medium.

Absorption
Diffraction
Reflection
Refraction

Q.2.

The bending of a wave as it moves around an obstacle or passes through a narrow opening.

Absorption
Diffraction
Reflection
Refraction

Q.3.

______________________ occurs when waves combine to create a wave with a LOWER amplitude.

Diffraction
Constructive interference
Destructive interference
Refraction

Q.4.

When the frequency of a wave increases, what happens to the wavelength?

The wavelength is not directly affected by the frequency of a wave.
The wavelength increases.
The wavelength decreases.
More specific information is needed to form a conclusion about the wavelength.

Q.5.

Faraday's Law states that the induced emf is proportional to Hide answers

the current
the cross sectional area of the coil
the rate of change in the flux of the coil

Q.6.

A diffraction pattern is obtained using a beam of red light . What happens if the red light is replaced by Blue light?

No change
Diffraction bands become narrower and crowded together.
Bands become broader and farther apart
Bands disappear

Q.7.

The intensity of light for the interference of two light wave with a phase difference of ϕ\phiϕ is

I=4Iocos⁡ϕ2I=4I_o\cos\frac{\phi}{2}I=4Iocos2ϕ
I=4Iocos⁡2 ϕ2I=4I_o\cos^2\ \frac{\phi}{2}I=4Iocos2 2ϕ
I=4Iocos⁡ϕI=4I_o\cos\phiI=4Iocosϕ
I=4Io2cos⁡ϕI=4I_o^2\cos\phiI=4Io2cosϕ

Q.8.

All rays that are parallel to the principle axis in a concave mirror reflects

Towards the focal point
Away from the focal point
Towards the center of curvature
Away from the center of curvature

Q.9.

For diffraction at a single Slit, the angular position for nth secondary maxima is

θ=nλ\theta=n\lambdaθ=nλ
θ= nλa\theta=\ \frac{n\lambda}{a}θ= anλ
θ= (n+12)λa\theta=\ \left(n+\frac{1}{2}\right)\frac{\lambda}{a}θ= (n+21)aλ
θ= naλ\theta=\ \frac{na}{\lambda}θ= λna

Q.10.

Green light of wavelengthnm is incident normally on a grating, and the second order is diffracted 32.0°32.0\degree32. from the normal. How many lines per cm are marked on the grating?

3300
4700
5300
6200

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