Banner 0
Banner 1
Banner 2
Banner 3
Banner 4
Banner 5

Q.

When a certain metal was irradiated with light of frequency 3.2 × 1016 Hz, the photoelectrons emitted had twice the kinetic energy as did photoelectrons when the same metal was irradiated with light of frequency 2.0 × 1016Hz. The threshold frequency for the metal is:

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

1.2 × 1016 Hz

b

1.2 × 1015 Hz

c

8 × 1016 Hz

d

8 × 1015 Hz

answer is B.

(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

KE=-o given KE2=KE1 v2-vo=KE2h v1-v0=KE1h v2-vov1-v0=KE2KE1=2KE1KE1=2 v2-v= 2×v1-v0 on solving  vo=8.0 ×1015Hz

Watch 3-min video & get full concept clarity

Best Courses for You

JEE

JEE

NEET

NEET

Foundation JEE

Foundation JEE

Foundation NEET

Foundation NEET

CBSE

CBSE

score_test_img

Get Expert Academic Guidance – Connect with a Counselor Today!

whats app icon