Radiation of wavelength \[\lambda \], is incident on a photocell. The fastest emitted electron has speed v. If the wavelength is changed to \[\frac{3\lambda }{4}\], the speed of the fastest emitted electron will be:

\[<v{{\left( \frac{4}{3} \right)}^{\frac{1}{2}}}\]

\[=v{{\left( \frac{4}{3} \right)}^{\frac{1}{2}}}\]

\[=v{{\left( \frac{3}{4} \right)}^{\frac{1}{2}}}\]

\[>v{{\left( \frac{4}{3} \right)}^{\frac{1}{2}}}\]

Radiation of wavelength \[\lambda \], is incident on a photocell. The

1.	Radiation of wavelength \[\lambda \], is incident on a photocell. The fastest emitted electron has speed v. If the wavelength is changed to \[\frac{3\lambda }{4}\], the speed of the fastest emitted electron will be:
A.	\[=v{{\left( \frac{4}{3} \right)}^{\frac{1}{2}}}\]
B.	\[=v{{\left( \frac{3}{4} \right)}^{\frac{1}{2}}}\]
C.	\[>v{{\left( \frac{4}{3} \right)}^{\frac{1}{2}}}\]
D.	\[<v{{\left( \frac{4}{3} \right)}^{\frac{1}{2}}}\]
Answer» D. \[<v{{\left( \frac{4}{3} \right)}^{\frac{1}{2}}}\]