Physics
The Laser is a beam of radiations which are

Coherent and non-monochromatic
Coherent and monochromatic
Non-coherent and non-monochromatic
Non-coherent and monochromatic

ANSWER DOWNLOAD EXAMIANS APP

Physics
Stationary wave is formed by

A transverse wave superposing a longitudinal wave
Two waves of same frequency travelling in the opposite direction
Two waves of the same speed superposing
Two waves of same frequency travelling in the same direction

ANSWER DOWNLOAD EXAMIANS APP

Physics
Why does the sea appear blue in colour?

Refraction of the sun light
Scattering of the sunlight by water molecules
Reflection of the sun light from water surface
Interference of the sun light from water surface

ANSWER DOWNLOAD EXAMIANS APP