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.Management Sciences
Category: Physical Optics
The velocity of light was determined accurately by_______________?
A. Newton
B. Michelson
C. Huygen
D. Young
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
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
According to Einstein light travels form one place to another in the form of ________________?
A. waves
B. particles
C. photons
D. it was not his discovery
A thing that emits its own light is___________________?
A. luminous
B. non-luminous
C. incandescent
D. bright
Light reaches the earth form sun in nearly____________________?
A. 15 minutes
B. 10 minutes
C. 8 minutes
D. 8 minutes 30 seconds
Diffraction effect is____________________?
A. more for a round edge
B. less for a round edge
C. more for a sharp edge
D. less for a sharp edge
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
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
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