A. bright fringes are wider than dark fringes
B. dark fringes are wider than bright fringe
C. both dark and bright fringes are of equal width
D. central fringes are brighter than the outer fringes
Related Mcqs:
- Two coherent sources of light produce interference (destructive) when the phase difference between them is _________?
A. π
B. 2π
C. π/2
D. π/4Submitted by: Rizwan Ayub Saadi
- Optical active crystals rotates the __________________?
A. vibrating plane
B. polarization plane
C. diffraction plane
D. interference plane - Which one of the following is nearly monochromatic light ?
A. light form fluorescent tube
B. light form neon lamp
C. light form sodium lamp
D. light form simple lamp - In a plane polarized light _________________?
A. vibration in all direction
B. vibration in two mutually perpendicular directions
C. vibration take place in a direction perpendicular to the direction of propagation of light
D. no vibration at all - Which one of the following cannot be polarized ?
A. radio waves
B. ultraviolot rays
C. X-rays
D. sound waves - When light incident normally on thin film the path difference depends upon ________________?
A. thickness of the film only
B. nature of the film only
C. angle of indidence only
D. all thickness nature and angle of incidence - The velocity of light was determined accurately by_______________?
A. Newton
B. Michelson
C. Huygen
D. Young - appearance of colour in thin films is due to ____________________?
A. diffraction
B. dispersion
C. interference
D. polarization - Diffraction fringes are____________________?
A. equally spaced
B. distance between them increases
C. distance between then decreases
D. they are adjacent with no space in between - A thing that emits its own light is___________________?
A. luminous
B. non-luminous
C. incandescent
D. bright
