Dual Nature of ...

In a photoelectric experiment for 4000 Å incident radiation, the potential difference to stop the ejection is 2V. If the incident light is changed to 3000 Å, then the potential required to stop the ejection of electrons will be

Photo cell is a device to

If the work function for a certain metal is 3.2 × 10^–19 joule and it is illuminated with light of frequency 8 × 10¹⁴ Hz. The maximum kinetic energy of the photoelectrons would be (h = 6.63 × 10^–34 Js)

Stopping potential for photoelectrons

The maximum wavelength of radiation that can produce photoelectric effect in a certain metal is 200 nm. The maximum kinetic energy acquired by electron due to radiation of wavelength 100 nm will be

When the light source is kept 20 cm away from a photo cell, stopping potential 0.6 V is obtained. When source is kept 40 cm away, the stopping potential will be

Light of wavelength 4000 Å falls on a photosensitive metal and a negative 2V potential stops the emitted electrons. The work function of the material (in eV) is approximately (h = 6.6 × 10^{– 34} Js, e = 1.6 × 10^{– 19} C, c = 3 × 10⁸ ms^{– 1})

Assuming photoemission to take place, the factor by which the maximum velocity of the emitted photoelectrons changes when the wavelength of the incident radiation is increased four times, is

Energy conversion in a photoelectric cell takes place from