In an interference pattern______________________?
A. bright fringes are wider than dark fringes
B. dark fringes are wider than bright fringe
both dark and bright fringes are of equal width
central fringes are brighter than the outer fringes
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In double slit experiment if one of the two slit is covered then________________?
A. no interference fringes are observed
B. no diffraction fringes are observed
C. no fringes observed
D. interference pattern not disturbed
In monochromatic red light a blue book will probably appear to be_________________?
A. black
B. purple
C. green
D. no scientific reasoning available
Which one of the following cannot be polarized ?
A. radio waves
B. ultraviolet rays
C. X-rays
D. sound waves
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
Wavelength of X-rays falling at glancing angle of 30? on a crystal with atmic spacing 2 x 10-10 for the fist order diffraction is________________?
A. 4 x 10-10 m
B. 2 x 10-10 m
C. 0.02×10-10m
D. 20×10-10m
When one mirror of a Michelson Interferometer is moved a distance of 0.5 mm we observe 2000 fringes. What will be wavelength of light used ?
A. 5000 nm
B. 5000A
C. 500m
D. 2000um
The blue colour of the sky is due to___________________?
A. diffraction
B. reflection
C. polarization
D. scattering
In Young double slit experiment, if white light is used____________________?
A. alternate dark and bright fringes will be seen
B. coloured fringes will be seen
C. no interference fringes will be seen
D. impossible to predict
When crest of one wave falls over the trough of the other wave this phenomenon is known as________________?
A. polarization
B. constructive interference
C. destructive interference
D. diffraction
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