Refraction
Interference
Diffraction
Polarisation
Sound waves in air are ........... waves
Specific gravity is defined as the ratio of
Speed in a given direction is called
Speed of light is maximum in _
Speed of sound in air is unaffected by change in
Speed of sound is maximum in which among the following?
Speed of sound is the greatest in :
Sphygmomanometer measures
Sprayer functions on
Stars appear twinkling as of......... of light.
