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When the wave of hydrogen atom comes from infinity into the first orbit, the value of wave number is
Options
(a) 109700 cm⁻¹
(b) 1097 cm⁻¹
(c) 109 cm⁻¹
(d) None of these
Correct Answer:
109700 cm⁻¹
Explanation:
Wave number = 109700 cm
ῡ = 1 / λ = R[(1/n₁²) – (1/n₂²)] = (R / n₁²) Because n₂ = ∞ and n₁ = 1
ῡ = 1.097 × 10⁷ m⁻¹ = 109700 cm⁻¹
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Topics: Atoms and Nuclei
(136)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two satellites of earth, S₁ and S₂ are moving in the same orbit. The mass of S₁
- The temperature coefficient of a resistance wire is 0.00125 per degree.
- When a spring is extended by 2 cm energy stored is 100 J. When extended further by 2 cm
- If ∆U and ∆W represent the increase in internal energy and work done by the system
- A polished metal plate has a rough and black-spot. It is heated to 1400 K
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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