In LED, intensity of emitted light...

In LED, intensity of emitted light

increase with forward current.

decreases with forward current.

increases with reverse current.

decreases with reverse current.

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The axes of a polarizer and an analyzer are oriented at 30^(@) to each other. (a) If unpolarized light of intensity I_(0) is incident on them, what is the intensity of the transmitted light? (b) Polarized light of intensity I_(0) is incident on this polarizer-analyzer system. If the amplitude of the light makes an angle of 30^(@) with the axis of the polarizer, what is the intensity of the transmitted 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.

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The photoelectros emitted by an illuminted surface have a maximum kinetic energy of 3.0 eV. If the intensity of the light is tripled, What is the maximum kinetic energy of photoelectrons now?

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

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In LED, intensity of emitted light
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