Advertisements
Advertisements
Question
What is a surface barrier?
Advertisements
Solution
- To leave the metallic surface, the free electrons must cross a potential barrier created by the positive nuclei of the metal.
- The potential barrier which prevents free electrons from leaving the metallic surface is called the surface barrier.
APPEARS IN
RELATED QUESTIONS
The threshold wavelength for a metal surface whose photoelectric work function is 3.313 eV is __________.
Photons of wavelength λ are incident on a metal. The most energetic electrons ejected from the metal are bent into a circular arc of radius R by a perpendicular magnetic field having magnitude B. The work function of the metal is
How does photocurrent vary with the intensity of the incident light?
How will you define threshold frequency?
Explain the effect of potential difference on photoelectric current.
Explain how frequency of incident light varies with stopping potential.
Explain the quantum concept of light.
How many photons per second emanate from a 50 mW laser of 640 nm?
How many photons of frequency 1014 Hz will make up 19.86 J of energy?
When a light of frequency 9 × 1014 Hz is incident on a metal surface, photoelectrons are emitted with a maximum speed of 8 × 105 ms−1. Determine the threshold frequency of the surface.
