Physics
Intensity of sound has

no existence
a subject existence
both subjective and objective existence
an object existence

ANSWER DOWNLOAD EXAMIANS APP

Physics
What is refractive index ?

It is defined as the ratio of speed of light in vacuum to the speed of light in the medium.
It is defined as the ratio of speed of light in the medium to the speed of light in vacuum.
It is defined as the product of speed of light in medium and in vacuum.
None of above

ANSWER DOWNLOAD EXAMIANS APP