It is found that yellow light does not eject photoelectrons from a metal. Is it advisable to try with orange light? With green light?

A metallic surface is illuminated alternatively with light of wavelenghts 3000 Å and 6000 Å . It is observed that the maximum speeds of the photoelectrons under these illuminations are in the ratio 3 : 1 . Calculate the work function of the metal and the maximum speed of the photoelectrons in two cases.

Work function of metal is 2 eV.Light of intensity 10^(-5)Wm^(-2) is incident on 2 cm^(2) area of it.If 10^(17) electrons of these metals absorb the light,in how much time does the photo electric effect start?Consider the waveform of incident light.

The medium in which the speed of light is half of the speed in air, if light travels from such medium to air, then for what angle of incidence light will do total internal refelction ?

In the shown expermiental setup to study photoelectric effect, two conducting electrodes are enclosed in an evacuated glass-tube as shown. A parallel beam of monochromatic light, falls on photosensitive electrodes. The emf of battery shwon is high enough such that all photoelectron ejected from left electrode will reach the right electrode. Under initial conditions photoelectrons are emitted. AS changes are made in each situation of column-I, Match the statements in column-I with results in column-II. {:(,"Column I",,"Column II"),((A),"If frequency of incident light is increased keeping its intensity constant",(p),"magnitude of stopping potential"),((B),"If frequency of incident light is increased and its intensity is decreased",(q),"current through circuit may stop"),((C),"If work function of photo sensitive electrode is increased",(r),"maximum kinetic energy of ejected photoelectrons will increase"),((D),"If intensity of incident light is increased keeping its frequency constant",(s),"saturation current will increase"):}

Wave property of electrons implies that they will show diffraction effects. Davission and Germer demonstrated this by diffracting electrons from crystals. The law governing the diffraction from a crystal is obtained by requiring that electron waves reflected from the planes of atoms in a crystal interfere constructively (see figure) The surface of a metal is illuminated with the light of 400 nm . The kinetic energy of the ejected photoelectrons was found to be 1.68 eV . The work function of the metal is : ( hc = 1240 eV-nm )

For light diverging from a point source

What protects us from UV light emitted by the sun ?

A sodium street light gives off yellow light that has a wavelength of 589nm . What is the frequency of this light?

On which does the scattering of light depend ?

Which ray of light is present exactly at the middle of the spectrum obtained from white light?