Question

Which one of the following corresponds to a photon of highest energy?
$\begin{array}{rlll}\text { (A) } \lambda=300 \mathrm{~nm} & \text { (B) } v=3 \times 10^{8} \mathrm{~s}^{-1} & \text { (C) } v=30 \mathrm{~cm}^{-1} & \text { (D) } \varepsilon=6.626 \times 10^{-27} \mathrm{~J}\end{array}$

Answer 1

Ans: $($ A)
$$\begin{aligned} \text { Option }(\mathrm{a}): E &=6.626 \times 10^{-34} \mathrm{~J} . \mathrm{s} \times 3 \times 10^{8} \mathrm{~m} / \mathrm{s} \times \frac{1}{300 \times 10^{-9} \mathrm{~m}} \\ &=6.626 \times 10^{-19 \mathrm{~J}} \end{aligned}$$
Option (b) : $E=6.626 \times 10^{-34} \mathrm{~J} . \mathrm{s} \times 3 \times 10^{8}=1.9878 \times 10^{-25} \mathrm{~J}$
Option (c): $E=6.626 \times 10^{-34} \mathrm{~J} . \mathrm{s} \times 3 \times 10^{8} \mathrm{~m} / \mathrm{s} \times 30 \times 10^{2} \mathrm{~m}^{-1}=5.9634 \times 10^{-22} \mathrm{~J}$
Option (d) : $E=6.626 \times 10^{27} \mathrm{~J}$
Among these, maximum energy is $6.626 \times 10^{19} \mathrm{~J}$

Answer 2

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Answer 3

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