A certain metallic surface is illuminated with monochromatic light of wavelength $λ$ .The stopping potential for photo – electric current for this light is $3 V_{0}$ . If the same surface is illuminated with light of wavelength $2 λ$ , the stopping potential is $V_{0}$ . The threshold wavelength for this surface for the photoelectric effect is

see full answer

High-Paying Jobs That Even AI Can’t Replace — Through JEE/NEET

🎯 Hear from the experts why preparing for JEE/NEET today sets you up for future-proof, high-income careers tomorrow.

An Intiative by Sri Chaitanya

$6 λ$

$4 λ$

$\frac{λ}{4}$

$\frac{λ}{6}$

answer is B.

(Unlock A.I Detailed Solution for FREE)

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

$3 e V_{0} = h c (\frac{1}{λ} - \frac{1}{λ_{0}})$

$e V_{0} = h c (\frac{1}{2 λ} - \frac{1}{λ_{0}}) \Rightarrow λ_{0} = 4 λ$

Watch 3-min video & get full concept clarity

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test