Interference General Case
Trending Questions
Q.
How do you calculate fringe spacing?
Q. The interference pattern is obtained with two coherent light sources of intensity ratio n. In the interference pattern, the ratio Imax−IminImax+Imin will be
- 2√n(n+1)2
- √nn+1
- 2√nn+1
- √n(n+1)2
Q. Two waves interfere at a point. Vibrations due to the waves at that point can be represented by y1=4sinωt and y2=3sin(ωt+π3). The amplitude of the resulting wave is nearly
- 3
- 4
- 5
- 6
Q. Two waves represented by y = a sin (ωt − kx) and y = a cos (ωt − kx) are superimposed. The resultant wave will have an amplitude
a
√2a
2a
0
Q.
A plane wave of monochromatic light falls normally on a uniform thin film of oil which covers a glass plate. The wavelength of sources can be varied continuously. Complete destructive refraction is observed for λ=5000˙A and λ=7000˙A and for no other wavelength in between. If μ of oil is 1.3 and that of glass is 1.5, the thickness of the film will be
- 6.378×10−5cm
- 5.7×10−5cm
- 4×10−5cm
- 2.8×10−5cm