Question

▶What is photoelectric effect!?

▶state any four properties of photons

▶ On increasing the intensity of light
a)will the Energy of the photon change!?
b) will the no of photoelectrons emitted per second change!?

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Answer 1

Answer:

hi frnd...

Photoelectric effect is defined as the emission of electrons becoz of the incidence of light rays ...

photons are energy packets

Answer 2

Hey there_!

▶PHOTOELECTRIC EFFECT: When radiation of high frequency (or) low Wavelength is incident on metal surface, the free electrons are ejected out of the metal surface.

▶PROPERTIES OF PHOTONS :

1. In the newtonian mechanics mass of photon is not defined, but rest mass of photon is zero

2. Photons travel with the speed of light i.e, with the speed of 2,99,792,458 m/s

3. Photons have definite momentum and definite energy

4. Photons are neutral

5. On increasing intensity of radiation, no of photoelectrons increases, but energy of each photon is still the same.

6.All collisions between electron and material particles are ELASTIC

➡ON INCREASING INTENSITY OF LIGHT

▶ No of photoelectrons emitted increases but energy of each photon is still the same. Hence there is no change in the energy of photon on increaeing intensity of incident radiation.

▶Of course, increasing intensity of radiation increases no of photons, as a result no of photoelectrons emitted per second increases.