Question

The ratio of energies of two photons of
wavelengths 2000 and 4000 A'.
1) 1:4 2)4:1 3) 1:2 4) 2:1​

Answer 1

Answer: by the formula E= hc/lmbda we get

E1/E2= lmbda2/ lmbda 1

So E1/E2=4/2

Explanation:that is E1/E2=2:1 option 4 is answer

Answer 2

Answer:

E=hc / lamda

E1/E2 = lamda2/lamda1

         =4000 / 2000 = 2:1

Explanation: