CameraIcon
CameraIcon
SearchIcon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Threshold wavelength for lithium metal is 6250˚A. For photo emission, the wavelength of the incident light must be ___________.

A
Exactly equal to 6250˚A
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
More than 6250˚A
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Equal to or more than 6250˚A
No worries! We‘ve got your back. Try BYJU‘S free classes today!
D
Equal to or less than 6250˚A
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
Open in App
Solution

The correct option is D Equal to or less than 6250˚A
The threshold wavelength of a material signifies that if the photons of energy corresponding to this wavelength or higher strike onto the material, they will undergo photo electric effect. As the energy of a photon is inversely proportional to wavelength (E=λhc), the photonic wavelength should be less than equal to threshold wavelength.
Option-D is correct

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Work Function
PHYSICS
Watch in App
Join BYJU'S Learning Program
CrossIcon