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The wavelength of Kα line in copper is 1.5Å. The ionisation energy of K electron in copper is
Options
(a) 11.2×10⁻¹⁷ J
(b) 12.9×10⁻¹⁶ J
(c) 1.7×10⁻¹⁵ J
(d) 10×10⁻¹⁶ J
Correct Answer:
12.9×10⁻¹⁶ J
Explanation:
Required ionization energy, E = hc / λ
E = 6.6 × 10⁻³⁴ × 3 × 10⁸ / 1.5 × 10⁻¹°
= 12.9 × 10⁻¹⁶ J
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Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A short linear object of length L lies on the axis of a spherical mirror of focal
- To demonstrate the phenomenon of interference, we require two sources which emit
- The Rutherford scattering experiment proves that an atom consists of
- A slab consists of two parallel layers of two different materials of same thickness
- A circuit contains an ammeter, a battery of 30 V and a resistance 40.8 ohm
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Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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