Answer:
The correct option is (a).
Explanation:
The energy of photon is given by :
[tex]E=h\times f[/tex]
Where
h is the Planck's constant
f is the frequency of wave
There is a relation between the frequency and the wavelength of a wave as :
[tex]f=\dfrac{v}{\lambda}[/tex]
[tex]\lambda[/tex] is the wavelength
v is the velocity of wave
Energy of photon can be given by :
[tex]E=h\times \dfrac{v}{\lambda}[/tex].............(1)
From equation (1) it is clear that the energy of a photon is directly proportional to its velocity. So, the correct option is (a).