Shaalaa.com | Interference and Diffraction
The co-efficient of reflection of an opaque body is 0.16. Its co-efficient of emission is ........................................
A parallel beam of monochromatic light is incident on a glass slab at an angle of incidence 60o. Find the ratio of width of the beam in the glass to that in the air if refractive index of glass is 3/2.
In a biprism experiment, the light of wavelength 5200Å is used to get an interference pattern on the screen. The fringe width changes by 1.3 mm when the screen is moved towards biprism by 50 cm. Find the distance between two virtual images of the slit.
A parallel beam of light travelling in water is incident obliquely on a glass surface. After refraction its width ..............
c) remains the same
d) becomes zero
In interference pattern, using two coherent sources of light; the fringe width is ________
(a) directly proportional to the wavelength
(b) inversely proportional to the square of the wavelength
(c) inversely proportional to wavelength.
(d) directly proportional to the square of the wavelength.