How is the intensity of radiation determined?

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(A) The intensity of radiation is defined as the amount of energy incident per unit area per unit time.In terms of the particle nature of light (photo

Vedclass · Accepted Answer

By the number of photons incident per unit area per unit time.

Vedclass · Answer

(A) The intensity of radiation is defined as the amount of energy incident per unit area per unit time.In terms of the particle nature of light (photons),the intensity is directly proportional to the number of photons incident on a surface per unit area per unit time.Mathematically,if $N$ photons of frequency $
u$ are incident on an area $A$ in time $t$,the intensity $I$ is given by $I = \frac{N \cdot h
u}{A \cdot t}$.Since $h$ and $
u$ are constant for a given radiation,the intensity depends on the number of photons $N$ per unit area per unit time.

Similar Questions

According to the corpuscular theory of light,the different colours of light are due to

The momentum of a photon with a wavelength of $5000\,\mathring{A}$ is:

If the wavelength of a photon is $4000 \text{ Å}$,then its energy will be

The number of photons emitted by a $10\,W$ bulb in $10\,s,$ if the wavelength of light is $1000\,\mathring{A},$ is:

The momentum of a photon is $3.3 \times 10^{-29} \ kg \ m/s$. Its frequency will be

Vedclass Test Series

Exam Paper Generator

Online Exam Module