CBSE
The ratio of intensities of two waves is 1: 9. The waves interference, what will be the ratio of maximum and minimum intensities?
1:4
4:1
3:2
2:3
In single slit diffraction pattern
central fringe has negligible width than others
all fringes are of same width
central fringe does not exist
none of the above
The slit width, when a light of wavelength 6500 Å is incident on a slit, if first minima for red light is at 30°, is :
1 × 10-6 m
5.2 × 10-6 m
1.3 × 10-6 m
2.6 × 10-6 m
Two coherent monochromatic light beams of intensities I and 9I are superimposed.The maximum and the minimum intensities of the resultant beams are
10 I and zero
10 I and 8 I
10 I and 4 I
16 I and 4 I
In a single slit diffraction pattern, the distance between the first minimum on the left and the first minimum on the right is 5 mm. The screen on which the diffraction pattern is displayed is at a distance of 80 cm from the slit. The, wavelength is 6000 A. The slit width (in mm) is about
0.576
0.348
0.192
0.096
Ordinary light incident on a glass slab at the polarising angle suffers a deviation of 22°. The value of the angle of refraction in glass in this case is
56°
68°
34°
22°
In Young's experiment, the wavelength of red light is 7800 and that of blue light is 5200 . The value of n for which (n + 1)th blue band coincides with nth red band is
1
2
3
4
To demonstrate the phenomenon of interference we require two sources which emit radiations of
nearly the same frequency
the same frequency
different wavelengths
the same frequency and having a definite phase relationship
The phenomenon of polarization of light indicates that
light is a longitudinal waves
light is transverse wave
light if not a wave
light travels with the velocity of 3x 108 m/s
Which one of the following does not support the wave nature of light?
Photoelectric effect
Interference
Polarization
Diffraction