Physics
Fiber optics cable used in communication, works on the principle of

Regular reflection of light
Total internal reflection of light
Refraction of light
Diffuse reflection of light

ANSWER DOWNLOAD EXAMIANS APP

Physics
To resolve an object in an electron microscope,

None of these
The wavelength of the electrons must be greater than the diameter of the object.
Both A & B
The wavelength of the electrons must be close to the diameter of the object

ANSWER DOWNLOAD EXAMIANS APP