Advertisements
Advertisements
प्रश्न
Give the definition of intensity of light according to quantum concept and its unit.
Advertisements
उत्तर
Intensity of light refers to the strength or brightness or amount of light produced by a specific source. Its unit is the candela (cd).
APPEARS IN
संबंधित प्रश्न
The work functions for metals A, B and C are 1.92 eV, 2.0 eV and 5.0 eV respectively. The metal/metals which will emit photoelectrons for a radiation of wavelength 4100Å is/are
How does photocurrent vary with the intensity of the incident light?
What is a photocell?
Define stopping potential.
What is a surface barrier?
Explain how frequency of incident light varies with stopping potential.
List out the laws of photoelectric effect.
Give the applications photocell.
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.
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)
