Physics
The sparkling of a diamond is due to

Polarisation of light
Total internal reflection of light
Refraction of light
Interference of light

ANSWER DOWNLOAD EXAMIANS APP

Physics
Why are we able to hear short wave broadcasts better than long wave broadcasts ?

By convention, short waves are meant for long distances, whereas long waves are reserved for short distances.
Short waves are more energetic than long waves.
Short waves are unaffected by atmospheric disturbances.
Short wave broadcasts are made by nearby radio stations.

ANSWER DOWNLOAD EXAMIANS APP