Home
Class 12
PHYSICS
What is photoelectric effect? State it l...

What is photoelectric effect? State it laws?

Text Solution

Verified by Experts

The phenomenon of emission of electrons from a metal surface when light of suitable frequency falls on it is known as photoelectric effect. Laws of photoelectric emission :
1. Photoelectric emission takes place from a metal surface, when frequency of incident light is above its threshold frequency.
2. The photoelectric emission starts as soon as the light is incident on the metal surface.
3. The maximum kinetic energy with which an electron is emitted from a metal surface is independent of the intensity of the light and depends upon its frequency.
4. The number of photoelectrons emitted is independent of the frequency of the incident light and depends only upon its intensity.
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise SHORT ANSWER TYPE QUESTIONS MOST EXPECTED QUESTIONS)|3 Videos

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS |32 Videos

  • PARTICLE NATURE OF RADIATION

    BETTER CHOICE PUBLICATION|Exercise VERY SHORT ANSWER QUESTIONS (MOST EXPECTED QUESTIONS)|6 Videos

  • OPTICAL INSTRUMENTS

    BETTER CHOICE PUBLICATION|Exercise NUMERICALS PROBLEMS |15 Videos

  • POLARISATION OF LIGHT

    BETTER CHOICE PUBLICATION|Exercise Most Expected Questions|4 Videos

Similar Questions

Explore conceptually related problems

Define photoelectric effect ?

What is photoelectric effect of light ? State its laws and derive these laws from Einstein's Photoelectric emission.

Knowledge Check

  • Photoelectric effect shows :

    A
    Wave nature of electrons
    B
    particle nature of light
    C
    both (a) and (b)
    D
    none.

    • Similar Questions

    Explore conceptually related problems

    What is photoelectric effect? Drive Einstein's photoelectric equation. Explain two laws of photoelectric effect on the basis of this relation. Explain the effect of increase in frequency of incident light on the velocity of photoelectrons ejected.

    What is photoelectric effect ? Explain the effect of increase of (i) frequency (ii) intensity of incident radiation on photoelectric current with suitable graphs.

    What is photoelectric effect? Which metal can cause photoelectric emission with visible light?

    What is photoelectric effect ? Explain the effect of increase in (i) frequency. (ii) intensity of incident light on photoelectrons emitted.

    What is photoelectric effect? Also define photoelectric current.

    What is reflection of light? State the laws of reflection of light.

    Do the non-metals show photoelectric effect ?

    Home
    Profile