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An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is
Options
(a) (E/2m)¹∕₂
(b) c(2mE)¹∕₂
(c) 1/c (2m/E)¹∕₂
(d) 1/c (E/2m)¹∕₂
Correct Answer:
1/c (E/2m)¹∕₂
Explanation:
λₑ = h / √2mE,
λp = hc / E,
E = hc / λp
λₑ / λp = (h / √2mE) (E / hc)
= 1/c √(E / 2m)
=1/c (E/2m)¹∕₂
Related Questions: - 1 a.m.u. is equivalent to
- A body of mass 120 kg and density 600 kg/m³ floats in water.
- A wire of length 1 m is moving at a speed of 2 ms⁻¹ perpendicular to its length
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Topics: Dual Nature of Matter and Radiation
(150)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- 1 a.m.u. is equivalent to
- A body of mass 120 kg and density 600 kg/m³ floats in water.
- A wire of length 1 m is moving at a speed of 2 ms⁻¹ perpendicular to its length
- The density of ice is 0.9 g/cc and that of sea water is 1.1 g/cc
- A magnetic needle suspended parallel to a magnetic field requires √3J of work
Topics: Dual Nature of Matter and Radiation (150)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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