In LED, intensity of emitted light

A polaroid is inclined at an angle 45^(@) with the incident light of intensity I_(0) . After polarisation, intensity of the light emitted from the polaroid is

Assertion (A) : On increasing the frequency of light larger number of photoelectrons are emitted . Reason (R) : The number of electrons emitted depends on the intensity of incident light.

Assertion (A) : On increasing the frequency of light larger number of photoelectrons are emitted . Reason (R) : The number of electrons emitted depends on the intensity of incident light.

Assertion: A photosensitive surface is illuminated by a monochromatic light of wavelength lambda and intensity I. The number of photoelectrons emitted per second is doubled when the intensity of light is doubled. However, the maximum speed of emitted electrons remains unchanged. Reason: The number of electrons emitted per second is directly proportional to the intensity of the incident light. The kinetic energy of the emitted photoelectrons is independent of the intensity of the light.

What do the acronyms LASER and LED stands for? Name the factor which determines (i) frequency and (ii) intensity of light emitted by LED.

The wavelength and intensity of light emitted by an LED depend upon

State the factor which controls intensity of light emitted by a LED.