Advertisements
Advertisements
प्रश्न
How does photocurrent vary with the intensity of the incident light?
उत्तर
Photocurrent – The number of electrons emitted per second is directly proportional to the intensity of the incident light.
APPEARS IN
संबंधित प्रश्न
In photoelectric emission, a radiation whose frequency is 4 times threshold frequency of a certain metal is incident on the metal. Then the maximum possible velocity of the emitted electron will be
If the mean wavelength of light from sun is taken as 550 nm and its mean power as 3.8 × 1026 W, then the average number of photons received by the human eye per second from sunlight is of the order of
What is a surface barrier?
Mention the two features of x-ray spectra, not explained by classical electromagnetic theory.
Explain how frequency of incident light varies with stopping potential.
Explain experimentally observed facts of the photoelectric effect with the help of Einstein’s explanation.
Give the construction and working of photo emissive cell.
Give the applications photocell.
At the given point of time, the earth receives energy from the sun at 4 cal cm–2 min–1. Determine the number of photons received on the surface of the Earth per cm2 per minute. (Given: Mean wavelength of sunlight = 5500 Å)
UV light of wavelength 1800 Å is incident on a lithium surface whose threshold wavelength is 4965 Å. Determine the maximum energy of the electron emitted.