Wavelength needed to double the energy of the ejected electrons

1. A.
   $\lambda_{1} < \lambda/2$
2. B.
   $\lambda_{1} = \lambda$
3. C.
   $\lambda_{1} > \lambda/2$
4. D.
   $\lambda_{1} = \lambda/2$

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1. A.
   $\lambda_1 < \dfrac{\lambda}{2}$
2. B.
   $\lambda_1 > \lambda$
3. C.
   $\lambda_1 > \dfrac{\lambda}{2} < \lambda$
4. D.
   $\lambda_1 = \dfrac{\lambda}{2}$

Tap an option to check your answer.