Wave Optics Tes...

When a source of light is receding away from an observer, then the spectral lines will get displaced towards

The limit of resolution of eye is approximately

Light waves can be polarised because they

Aperture of the human eye is 2 mm. Assuming the mean wavelength of light to be 5000 $$\overset{o}{A}$$, the angular resolution limit of the eye is nearly:

An observer on earth observes that wave length of spectral line in spectrum of a milky way shifts towards red end of spectrum. According to the observer, the milky-way is

A satisfactory photographic print is obtained at a distance of 2 m from a 60 Cd lamp when the exposure time is 10s. The time of exposure required for the same quality print at a distance 4 m from a 120 Cd lamp is:

The sum of the focal lengths of the objective and an eyepiece, in case of an astronomical telescope. is equal to : (final image is at $$\displaystyle \infty $$)

Which of the following phenomena can be demonstrated by light. But not with sound waves in an air column? 

A source of light suspended above a circular table at a height equal to the radius of the table gives an intensity I at the centre of the table, the intensity at the edge of the table would be (Assuming illuminance remains the same)

Which of the following phenomena can be demonstrated by light. But not with sound waves in an air column ?