NEET2014Chemistry-Energy in different atom state
NEET 2014 Chemistry Energy in different atom state MCQ Question
Type: MCQ-numerical-Medium-Class 11
Calculate the energy in joule corresponding to light of wavelength 45 nₘ. (Planck’s constant, h = 6.63 × 10⁻³⁴ J s, speed of light, c = 3 × 10⁸ m s⁻¹)
A
6.67 × 10¹⁵
B
6.67 × 10¹¹
C
4.42 × 10⁻¹⁵
D
4.42 × 10⁻¹⁸
Correct Answer
Option D
Detailed Explanation
Using E = hc/λ, substituting the given values, E = (6.63 × 10⁻³⁴ × 3 × 10⁸) / (45 × 10⁻⁹) = 4.42 × 10⁻¹⁸ J.
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