Monochromatic light with a frequency well above the cutoff frequency is incident on the emitter in a photoelectric effect apparatus. The frequency of the light is then doubled while the intensity is kept constant. How does this affect the photoelectric current?
The photoelectric current will increase.
The photoelectric current will decrease.
The photoelectric current will remain the same.
None of these
The energy of a photon of light of wavelength $450 nm$ is
The time taken by a photoelectron to come Out after the photon strikes is approximately
Monochromatic light of frequency $6.0 \times 10^{14}\,\, Hz$ is produced by a laser. The power emitted is $2 \times 10^{-3}\,\, W.$ The number of photons emitted, on the average, by the source per second is
Which of the following statements is not correct?