$hc(\frac{1}{\lambda_1} - \frac{1}{\lambda_2}) = eV_1 - eV_2$

$hc(\frac{1}{\lambda_2} - \frac{1}{\lambda_1}) = eV_1 - eV_2$

$hc(\frac{1}{\lambda_1} - \frac{1}{\lambda_2}) = eV_2 - eV_1$

$hc(\frac{1}{\lambda_1} + \frac{1}{\lambda_2}) = eV_1 + eV_2$

$3.2 imes {10^{ - 8}}{\rm{N}}$

$3.2 imes {10^{ - 7}}{\rm{N}}$

$5.12 imes {10^{ - 7}}{\rm{N}}$

$5.12 imes {10^{ - 8}}{\rm{N}}$

The kinetic energy of photoelectrons increases with increasing light intensity.

The number of photoelectrons emitted increases with increasing light intensity.

Existence of a threshold frequency below which no photoelectrons are emitted, regardless of intensity

The stopping potential is independent of the intensity of light.

$6.17 imes 10^{14}$

$6.17 imes 10^{15}$

$6.17 imes 10^{16}$

$6.17 imes 10^{17}$

Convex lenses

Magnetic field

Electric potential

All of these

$1.35 imes {10^5}\;{\rm{m}}{{\rm{s}}^{ - 1}}$

$2.7 imes {10^5}\;{\rm{m}}{{\rm{s}}^{ - 1}}$

$6.2 imes {10^5}\;{\rm{m}}{{\rm{s}}^{ - 1}}$

$8.1 imes {10^5}\;{\rm{m}}{{\rm{s}}^{ - 1}}$

Velocity of emitted photoelectron decreases

Velocity of emitted photoelectron increases

Velocity of photoelectron do not change

Photo electric current increases

c/v

v/c

cv

c/v^2

1

$0.5$

${10^{ - 15}}$

${10^{ - 34}}$

3.09 eV

1.42 eV

151 eV

1.68 eV

Change in the intensity of illumination into a change in the work function of the photo cathode

Change in the frequency of light into a change in the electric current

Change in the frequency of light into a change in electric voltage

Change in the intensity of illumination into a change in photoelectric current