Advertisements
Advertisements
प्रश्न
Give the applications photocell.
Advertisements
उत्तर
Applications of photocells:
- Photocells have many applications, especially as switches and sensors.
- Automatic lights that turn on when it gets dark use photocells, as well as street lights that switch on and off according to whether it is night or day.
- Photocells are used for the reproduction of sound in motion pictures and are used as timers to measure the speeds of athletes during a race.
- Photocells are used to measure the intensity of the given light and to calculate the exact time of exposure.
APPEARS IN
संबंधित प्रश्न
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
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?
How will you define threshold frequency?
What is a photocell?
Mention the two features of x-ray spectra, not explained by classical electromagnetic theory.
Explain how frequency of incident light varies with stopping potential.
List out the laws of photoelectric effect.
Explain the quantum concept of light.
