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1.
Light propagates rectilinearly, due to
2.
Which of the following is correct for light diverging from a point source?
3.
The refractive index of glass is 1.5 for light waves of X = 6000 A in vacuum. Its wavelength in glass is
4.
The idea of secondary wavelets for the. propagation of a wave was first given by
5.
The angle of incidence at which reflected light is totally polarised for reflection from air to glass (refractive index n) is
6.
In Young's double-slit experiment, the intensity at the central maximum is I0 if one of the slit is covered, then the intensity at the central maximum become:
7.
In Young's double slit experiment, if the monochromatic source of yellow light is replaced by red light, the fringe width
8.
A double slit interference experiment is carried out in air and the entire arrangement is dipped in water. The fringe width
9.
The phenomenon of interference is based on
10.
Resolving power of microscope depends upon