Chemistry-(general)
NEET Chemistry (general) MCQ Question
Type: MCQ-numerical-Medium-Class 11
Calculate the energy of a single photon emitted by a nitrogen laser with a wavelength of 337.1 nm.
A
5.89 × 10^-19 J
B
69 × 10^-19 J
C
7.54 × 10^-19 J
D
34 × 10^-19 J
Correct Answer
Option B
Detailed Explanation
The energy of a photon can be calculated using E = hc/λ, where h is Planck's constant (6.626 × 10^-34 Js) and c is the speed of light (3.0 × 10^8 m/s). Substituting λ = 337.1 nm (or 337.1 × 10^-9 m), E ≈ 3.69 × 10^-19 J.
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