First slide

Photo Electric Effect

Question

Energy of a photon is $E_{r}$ for red light, $E_{v}$ for violet light, $E_{g}$ for green light and $E_{b}$ for blue light. Then

Easy

A

$E_{r} > E_{g} > E_{b} > E_{v}$
B

$E_{r} < E_{g} < E_{b} < E_{v}$
C

$E_{r} < E_{g} > E_{b} > E_{v}$
D

$E_{r} > E_{g} < E_{b} < E_{v}$

Solution

E = Energy of photon $= \frac{h c}{λ}$
Since $λ_{r} > λ_{g} > λ_{b} > λ_{v}$ , we can conclude that $E_{r} < E_{g} < E_{b} < E_{v}$

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