
Assertion: For best contrast between maxima and minima in the interference pattern of young's double slit experiment, the intensity of light emerging out of the two slits should be equal.
Reason: The intensity of interference pattern is proportional to square of amplitude.


Important Questions on Wave Optics
Assertion: In Young's double slit experiment, the fringes become indistinct if one of the slits is covered with partially opaque paper.
Reason: The partially opaque paper decreases the wavelength of light.

Assertion: The unpolarized light and polarised light can be distinguished from each other by using Polaroid.
Reason: A Polaroid is capable of producing plane polarised beams of light.

An observer is moving with half the speed of light towards a stationary microwave source emitting waves at frequency . What is the frequency of the microwave measured by the observer? (speed of light)





