Crystals of a material can behave as:
A. Convex lens
B. Interferometer
C. Diffraction grating
D. Concave
Which one of the following cannot be polarized:
A. radio waves
B. ultraviolet rays
C. X-rays
D. sound waves
In monochromatic red light a blue book will probably appear to be:
A. black
B. purple
C. green
D. no scientific reasoning available
A thing that emits its own light is:
A. luminous
B. non-luminous
C. incandescent
D. bright
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
Light on passing through a Polaroid is:
A. plane polarized
B. un-polarized
C. circularly polarized
D. elliptically polarized
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
appearance of colour in thin films is due to:
A. diffraction
B. dispersion
C. interference
D. polarization
The velocity of light was determined accurately by:
A. Newton
B. Michelson
C. Huygen
D. Young
The locus of all points in a medium having the same phase of vibration is called:
A. crest
B. trough
C. wavelength
D. wave front
