A metal is illumimated by light of two different wavelength `248nm` and `310 nm` . The maximum speeds of the photoelecrtron corresponding in these wavwlength are ``u_(1) and u_(2)` respectively . If the ratio u_(1) : u_(2) = 2 : 1 ` and `hc = 1240 eVnm `, the work function of the inetial is rearly

A metal is illumimated by light of two different wavelength 248nm and 310 nm . The maximum speeds of the photoelectrons corresponding in these wavelength are u_(1) and u_(2) respectively . If the ratio u_(1) : u_(2) = 2 : 1 and hc = 1240 eVnm , the work function of the meal is nearly

A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoelectrons corresponding to these wavelengths are mu_1 and mu_2 respectively. If the ratio u_1: u_2 = 2:1 and hc= 1240 eV , the work function of the metal is nearly.

A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoelectrons corresponding to these wavelengths are u_1 and u_2 respectively. If the ratio u_1: u_2 = 2:1 and hc= 1240 eV nm, the work function of the metal is neraly. (a)3.7 eV (b) 3.2 eV (c ) 2.8eV (d) 2.5eV.

A metal surface is illuminated by light of two different wavelengths 248 nm and 310 nm. The maximum speeds of the photoelectrons corresponding to these wavelengths are mu_1 and mu_2 respectively. If the ratio u_1: u_2 = 2:1 and hc= 1240 eV nm, the work function of the metal is neraly. (a)3.7 eV (b) 3.2 eV (c ) 2.8eV (d) 2.5eV.

Speed of light through two media of refractive indices mu_(1) and mu_(2) are u_(1) and u_(2) respectively, then

Surface of certain metal is first illuminated with light of wavelength lambda_(1)=350 nm and then, by light of wavelength lambda_(2)=540 nm. It is found that the maximum speed of the photo electrons in the two cases differ by a factor of 2. The work function of the metal (in eV) is close to : (Energy of photon =(1240)/(lambda("in nm"))Ev