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=4Io​cos2ϕ​
  • I=4Iocos⁡2 ϕ2I=4I_o\cos^2\ \frac{\phi}{2}I=4Io​cos2 2ϕ​
  • I=4Iocos⁡ϕI=4I_o\cos\phiI=4Io​cosϕ
  • I=4Io2cos⁡ϕI=4I_o^2\cos\phiI=4Io2​cosϕ
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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