Question

01.
Calculate energy of one photon of red light with
wave length 700 nm​

Answer 1

Formula for finding energy is,

$E = \frac{hc}{λ}$

Here,

h = Planck's Constant = 6.626 x 10^(-34)

c = Speed of light in vaccum = 3 x 10⁸ m/s

λ = 700 nm = 7 x 10^(-9) m

Therefore,

$E = \frac{(6.626 \times {10}^{- 34} \times 3 \times {10}^{8} )}{(7 \times {10}^{- 9} )} = 2.84 \times {10}^{ - 17} J$

Hope It Helps :)

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