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1)

The energies E1 and E2 of two radiations are 25 eV and 50 eV respectively. The relation between their wavelengths i.e., λ1 and λ2 will be :


A) λ1=λ2

B) λ1=2λ2

C) λ1=4λ2

D) λ1=1/2λ2

Answer:

Option B

Explanation:

Given E= 25 eV E2 = 50 eV

E1=hcλ1  E2=hcλ2

E1E2=λ2λ1

λ2λ1=2550 = 1/2

λ1=2λ2