Answer:
The energy of a photon is \(3.8\times10^{-19}\ eV\).
Explanation:
Given that,
Wave length = 520 nm
\(1 nm = 1\times 10^{-9}\ m\)
Using plank's equation
\(E =h
u\)...(I)
Here, h = plank constant
υ = frequency
Now, using wave equation
\(c =\lambda\times
u\)
The equation can be written as:
\(u = \dfrac{c}{\lambda}\)
Here, c = speed of light
λ= wave length of light
Put the value of υ in equation (I)
The energy of photon is
\(E = h\times\dfrac{c}{\lambda}\)
\(E = \dfrac{6.63\times10^{-34}\times3\times10^{8}}{520\times10^{-9}}\)
\(E=3.8\times10^{-19}\ eV\)
Hence, The energy of a photon is \(3.8\times10^{-19}\ eV\).
