Critical angle of electromagnetic radiation takes place if__________________?

Related Mcqs:

The coherence length over which there is a strong relationship between amplitudes is_________________?

A. Directly proportional to the bandwidth B. Inversely proportional to the bandwidth C. The square of the bandwidth D. None of these...

The ratio of the total solar radiant energy returned by a planetary body to the total radiant energy incident on the body, the called________________?

A. Reflectance B. Reflectance factor C. Albedo D. None of these...

According to the Snell’s law if an electromagnetic wave is incident in a medium (refractive index n1) on another medium (refractive index m2)________________?

A. The angle of incidence is equal to the angle of refraction B. The angle of refraction r) is given by sin i C. Both A. and B. D. Neither A. nor B....

Pick up the important characteristic of a target which facilitates its identification from the following ?

A. Spectral variation B. Spatial variation C. Temporal variation D. All of these...

Which one of the following statements is correct ?

A. During the day, earth reflects solar radiation B. During the day, earth reflects both solar radiations the emission from its surface C. During the night, earth emits radiation from its surface D. All of these...