Tamil Nadu Board of Secondary EducationHSC Science Class 12th

# A proton and an electron have the same kinetic energy. Which one has a greater de Broglie wavelength? Justify. - Physics

Short Note

A proton and an electron have the same kinetic energy. Which one has a greater de Broglie wavelength? Justify.

#### Solution

de-Broglie wavelength of the particle is λ = "h"/"p" = "h"/sqrt(2"mK")

i.e. λ ∝ "h"/sqrt"m"

As for me << mp, so λe >> λp

Hence protons have a greater de-Broglie wavelength.

Concept: Matter Waves
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#### APPEARS IN

Tamil Nadu Board Samacheer Kalvi Class 12th Physics Volume 1 and 2 Answers Guide
Chapter 8 Dual Nature of Radiation and Matter
Evaluation | Q II. 11. | Page 137
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