When the intensity of light is low during night the light is detected by

Direction of light is detected by

When a more intense beam of light is passed during photoelectric effect then :

Explain the following giving reasons : (i) When monochromatic light is incident on a surface separating two media, the reflected and refracted light both have the same frequency as the incident frequency. (ii) When ligjt travels from a rarer to a denser medium, the speed decreases. Does this decrease in speed imply a reduction in the energy carried by the wave ? (iii) In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. What determines the intensity in the photon picture of light ?

As the intensity of incident light increases

A polariser and an analyser are oriented so that maximum light is transmitted what will be the intensity of outcoming light when analyer is rotated through 60^(@) .

A: In the wave picture of light, intensity of light is determined by the square of the amplitude of the wave. R: In the photon picture of light, for a given frequency, intensity of light is determined by the numberof photons per unit area.

In a Young's double slit experiment, the separation between the two slits is d and the wavelength of the light is lamda . The intensity of light falling on slit 1 is four times the intensity of light falling on slit 2. Choose the correct choice (s).

In young's double slit experiment using monochromatic light of wavelengths lambda , the intensity of light at a point on the screen with path difference lambda is M units. The intensity of light at a point where path difference is lambda//3 is

A polarizer-analyser set is adjusted such that the intensity of light coming out of the analyser is just 12.5 % of the original intensity of light incident on the polarizer. Assuming that the polarizer-analyser set does not absorb any light, the angle by which the analyser need to be rotated in any sense to increase the output intensity to double of the previous intensity, is :

A polarizer-analyser set is adjusted such that the intensity of light coming out of the analyser is just 12.5 % of the original intensity of light incident on the polarizer. Assuming that the polarizer-analyser set does not absorb any light, the angle by which the analyser need to be rotated in any sense to increase the output intensity to double of the previous intensity, is :