An unpolarised beam of intensity \(I_0\) is incident on a pair of nicols making angle of 60° with each other. The intensity of right emerging from the pair is
Which of the following is conserved when light waves interfere?
(a) phase
(b) intensity
(c) amplitude
(d) none of these
Which of the following is conserved when light waves interference?
(a) phase.
(b) intensity.
(c) amplitude.
(d) none of these.
In interference pattern, the energy is
A) created at maximum
(B) destroyed at minimum
(C) conserves but re-disturbed
(D) none of the above
Bending of Light phenomena is shown by
(a) Polarization
(b) Diffraction
(c) Interference
(d) Dispersion
The parameter of light wave which remain same after refraction
(A) speed
(B) frequency
(C) wavelength
(D) none of these
The colours on the soap bubble is due to
(a) Interference
(b) Diffraction
(c) Polarisation
(d) Reflection
Huygens theory could not explain
a. Reflection of light
b. Photoelectric effect
c. Interference of light
d. Diffraction of light
The electric flux through a closed gaussian surface depends upon
(A) Permittivity of the medium.
(B) Net charge enclosed only.
(C) Net charge enclosed and permittivity of the medium.
(D) Net charge enclosed, shape and size of the Gaussian surface and permittivity of the medium.
Two sources of light are said to be coherent, when they give light waves of same
(a) amplitude and phase.
(b) wavelength and constant phase difference.
(c) intensity and wavelength.
(d) phase and speed.
In an interference experiment, the spacing between successive maxima and minima is
(A) λd / D
(B) λD / d
(C) dD / λ
(D) λd / 4D
Graph represents q verses V for two capacitors having same plate separation but different plate area . Which is the correct option
The charges on two spheres are +7mC and –5mC respectively. They experience a force F. If each of them is given an additional charge of –2mC, the new force of attraction will be
The main condition for diffraction to be observed is
a. Size of obstacle should be much smaller than the wavelength of the wave.
b. Size of obstacle should be much larger than the wavelength of the wave.
c. Size of the obstacle should be comparable to the wavelength of the wave.
d. For any size of the obstacle.
In Young’s double slit experiment, the two slits are separated by 1 mm and the screen is placed at 1 m away. It produces the second dark fringe at At a distance of 2mm from the central fringe, the wavelength of monochromatic light used would be
(A) 1.3 x \(10^{-6}\) m
(B) 2 x \(10^{-6}\) cm
(C) 2 x \(10^{-9}\) m
(D) 1.3 x \(10^{-6}\) cm