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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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Subject: Physics
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An electric kettle has two heating elements. One brings it to boil in ten minutes
- The temperature coefficient of a resistance wire is 0.00125 per degree.
- By sucking through a straw, a student can reduce the pressure of his lungs
- A proton beam enters a magnetic field of 10⁻⁴ Wb/m² normally. If the specific charge
- A particle is released from rest from a tower of height h, i.e,t₁ : t₂ : t₃ is
Topics: Atoms and Nuclei (136)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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