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  4. Among the following four spectral regions, the photon has the highest energy in

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Q. Among the following four spectral regions, the photon has the highest energy in

Delhi UMET/DPMTDelhi UMET/DPMT 2009

Solution:

Energy of photon $E=\frac{h c}{\lambda}$
where $h$ and $c$ are constant.
$\therefore E \propto \frac{1}{\lambda}$
As $\lambda_{\text {infra }}>\lambda_{R}>\lambda_{B}>\lambda_{V}$
Energy of photon will be maximum for violet colour.