AP EAMCET202316 May 2023Evening ShiftPhysicsDual Nature of MatterActual
The threshold frequency of a photosensitive material is v . When photons of frequency 2 v incident on the material, photoelectrons are emitted with a maximum linear momentum P. To get photoelectrons with maximum linear momentum 2 P , the frequency of the incident photons is
Options
- A2 v
- B3 v
- C4 v
- D5 v
Correct answer
D. 5 v
Step-by-step solution
From the photoelectric equation aligned & h 2 v=h v+ P^2 2 m & h v= P^2 2 m ... (1) & h v^ =h v+ (2 p)^2 2 m & h v^ =h v+ 4 p^2 2 m ... (2) aligned Using the equation (1), we have aligned & h v^ = p^2 2 m + 4 p^2 2 m = 5 p^2 2 m & h v^ =5 h v & v^ =5 v aligned