Wave Optics Tes...

Choose the Correct answer from alternative given.
Wavefront is the locus of all points, where the particles of the medium vibrate with the same

The spectral line for a given element of light received from a distant star is shifted towards longer wavelength side by 0.025%. The velocity of star in the line of light is then

The human eye has an approximate angular resolution of $$\phi = 5.8 \times 10^{-4}$$rad and typical photoprinter prints a minimum of 300 dpi (dots per inch, 1 inch = 2.54 cm). At what minimal distance z should a printed page be held so that one does not see the individual dots? 

What is the minimum thickness of a soap film needed for constructive interference in reflected light, if the light incident on the film is $$\text{750 nm}$$? Assume that the refractive index for the film is $$\mu \, = \, 1.33.$$

Wavefront is the locus of all points, where the particles of the medium vibrate with the same.

Transverse nature of light was confirmed by the phenomenon of the

The diameter of the pupil of human eye is about 2 mm. Human eye is most sensitive to the wavelength of 555 nm. The limit of resolution of human eye is:

A slit of width a is illuminated by white light. The first minimum for red light $$(\lambda \, = \, 6500 \, \overset{0}{A})$$ will fall at $$\theta \, = \, 30$$ when a will be:

In Young's double slit eperiment two disturbances arriving at a point P have phase difference of $$\dfrac{\pi}{3}$$ . The intensity of this point expressed as a fraction of maximum intensity $$I_0$$ is then

A parallel beam of sodium light of wavelength 5890 $$\overset{0}{A}$$ is incident on a thin glass plate of refractive index 1.5 such that the angle of refraction in the plate is $$60^o$$. The smallest thickness of the plate which will make it dark by reflection: