Q.

Radiation of wavelength λ , is incident on a photocell. The fastest emitted electron has speed v  . If the wavelength is changed to 3λ4,  the speed of the fastest emitted electron will be: 

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
An Intiative by Sri Chaitanya

a

>v4312

b

=v4312

c

=v3412

d

<v4312

answer is C.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

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

Take Free Test

Detailed Solution

hcλhv0=12mv2             43hcλhv0=12mv'2           v'2v2=43vv0vv0v'=v43vv0vv0      v'>v43

Watch 3-min video & get full concept clarity

tricks from toppers of Infinity Learn

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon