The maximum velocity of an electron emitted by light of wavelength \[\lambda \] incident on the surface of a metal of work function \[\varphi ,\] is [MP PMT/PET 1998, MP PMT 2003]

\[{{\left[ \frac{2(h\lambda -\varphi )}{m} \right]}^{1/2}}\] Where h = Planck's constant, m = mass of electron and c = speed of light.

\[{{\left[ \frac{2(hc+\lambda \varphi )}{m\lambda } \right]}^{1/2}}\]

\[\frac{2(hc-\lambda \varphi )}{m}\]

\[{{\left[ \frac{2(hc-\lambda \varphi )}{m\lambda } \right]}^{1/2}}\]

The maximum velocity of an electron emitted by light of wavelength \[\

1.	The maximum velocity of an electron emitted by light of wavelength \[\lambda \] incident on the surface of a metal of work function \[\varphi ,\] is [MP PMT/PET 1998, MP PMT 2003]
A.	\[{{\left[ \frac{2(hc+\lambda \varphi )}{m\lambda } \right]}^{1/2}}\]
B.	\[\frac{2(hc-\lambda \varphi )}{m}\]
C.	\[{{\left[ \frac{2(hc-\lambda \varphi )}{m\lambda } \right]}^{1/2}}\]
D.	\[{{\left[ \frac{2(h\lambda -\varphi )}{m} \right]}^{1/2}}\] Where h = Planck's constant, m = mass of electron and c = speed of light.
Answer» D. \[{{\left[ \frac{2(h\lambda -\varphi )}{m} \right]}^{1/2}}\] Where h = Planck's constant, m = mass of electron and c = speed of light.