Wave Optics Set 5

At what angle should an unpolarised beam be incident on a crystal of , so that reflected beam is polarised?

In Young's double slit experiment when wavelength used is and the screen is from the slits, the fringes are wide. What is the distance between the slits

Light propagates 2cm distance in glass of refractive index 1.5 in time . In the same time , light propagates a distance of 2.25 cm in a medium. The refractive index of the medium is

In a two slit experiment with monochromatic light fringes are obtained on a screen placed at some distance from the slits. If the screen is moved by towards the slits, the change in fringe width is . If separation between the slits is , the wavelength of light used is

A narrow slit of width is illuminated by monochromatic light of wavelength . The distance between the first minima on either side on a screen at a distance of is

In the context of Doppler effect in light, the term 'red shift' signifies

The condition for obtaining secondary maxima in the diffraction pattern due to single slit is

In a single slit diffraction experiment first minimum for red light coincides with first maximum of some other wavelength '. The value of is

Two nicol prism are first crossed and then one of them is rotated through . The percentage of incident light transmitted is

The waves of wavelength emitted by any atom or molecule must have some finite total length which is known as coherence length. For sodium light, this length is . The number of oscillations in this length will be