The threshold frequency for a metal is 10^{15 | vedclass

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

Question

(A) Given: Threshold frequency $f_0 = 10^{15} \ Hz$ and wavelength $\lambda = 4000 \ \mathring A = 4000 	imes 10^{-10} \ m$. The frequency of the inc

Vedclass · Accepted Answer

Photoelectric effect does not occur.

Vedclass · Answer

(A) Given: Threshold frequency $f_0 = 10^{15} \ Hz$ and wavelength $\lambda = 4000 \ \mathring A = 4000 	imes 10^{-10} \ m$. The frequency of the incident light is $f = \frac{c}{\lambda} = \frac{3 	imes 10^8}{4000 	imes 10^{-10}} = \frac{3 	imes 10^8}{4 	imes 10^{-7}} = 0.75 	imes 10^{15} \ Hz$. For the photoelectric effect to occur,the incident frequency $f$ must be greater than or equal to the threshold frequency $f_0$ $(f \ge f_0)$. Here,$0.75 	imes 10^{15} \ Hz Since the incident frequency is less than the threshold frequency,no photoelectric effect occurs.

The threshold frequency for a metal is $10^{15} \ Hz$. Choose the correct statement when light of wavelength $4000 \ \mathring A$ is incident on it.

Similar Questions

In the photoelectric effect, keeping the frequency of incident radiation and the accelerating potential fixed, if the intensity of incident light is increased,

The figure represents the graph of photoelectric current $I$ versus applied voltage $(V)$. The maximum kinetic energy of the emitted photoelectrons is

Which of the following statements is correct in photoelectric emission?

Which of the following statements is true for photoelectrons emitted from a sodium metal surface?

The figure shows a plot of photo current versus anode potential for a photo sensitive surface for three different radiations. Which one of the following is a correct statement?

Vedclass Test Series

Exam Paper Generator

Online Exam Module