Energy of a photon is 4.5 eV/atom. The wavelength of the photon is equal to

A
27.757 nm
B
27579 nm
C
2757 nm
D
275.7 nm

Solution:

$E = \frac{hC}{λ}; E = 4.5 ev / atom; 4.5 \times 1.602 \times 10^{- 19} J = \frac{6.625 \times 10^{- 34} J . s \times 3 \times 10^{8} m / s}{λ}; λ = 2.757 \times 10^{- 7} m = 275.7 nm; or λ (nm) = \frac{1240}{E (ev / atom)}$

Related content

NEET Exam Centres in Hyderabad 2024

Ecology & Environments

NEET Exam Centres in Maharashtra 2024

CBSE Biotechnology and its Applications Class 12 Mind Map for Chapter 10 of Biology, Download PDF

NEET Exam Centres in Tamil Nadu 2024

NEET Exam Centres in Karnataka 2024

Microbes in Human Welfare Class 12 Mind Map- Check Characteristics, Classification, Functions & Examples

NEET Exam Centres in Gujarat 2024

Test your English Vocabulary

CUET Exam Dates 2024 – Application Form, Fees, Eligibility