Advertisements
Advertisements
Question
Mention the different types of photocells.
Advertisements
Solution
The different types of photocells:
- Photo emissive cell
- Photo voltaic cell
- Photo conductive cell
APPEARS IN
RELATED QUESTIONS
When a metallic surface is illuminated with radiation of wavelength λ, the stopping potential is V. If the same surface is illuminated with radiation of wavelength 2λ, the stopping potential is `"V"/4`. The threshold wavelength for the metallic surface 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
Give the definition of intensity of light according to quantum concept and its unit.
How will you define threshold frequency?
What is a photocell?
Briefly discuss the observations of Hertz, Hallwachs and Lenard.
Give the construction and working of photo emissive cell.
How many photons per second emanate from a 50 mW laser of 640 nm?
Calculate the energies of the photons associated with the following radiation:
- violet light of 413 nm
- X-rays of 0.1 nm
- radio waves of 10 m
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.
