Complete the following sentences :
(a) Sound can not travel through ___, but it requires a ___ .
(b) When sound travels in a medium, the particles of medium ___ but the disturbance ___ .
(c) A longitudinal wave is composed of compression and ___ .
(d) A transverse wave is composed of crest and ___ .
(e) Wave velocity = ___ x wavelength.
The disturbance in a medium travels by displacing the particles of the medium.
The disturbance created by a source producing sound in a medium travels through:
Fill in the blanks to complete the following sentences:
(a) When light travels from a rarer to a denser medium, its speed .............
(b) When light travels from a denser to a rarer medium, its speed..........
(c) The refractive index of glass with respect to air is 3/2. The refractive index of air with respect to glass will be....................