Chapter 29, Problem 41PE

### College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000

Chapter
Section

### College Physics

1st Edition
Paul Peter Urone + 1 other
ISBN: 9781938168000
Textbook Problem

# (a) A γ -ray photon has a momentum of 8.00 × 10 − 21   kg ⋅ m / s . What is its wavelength? (b) Calculate its energy in MeV.

To determine

(a)

The wavelength of a γ ray photon that has a momentum of 8×1021 kgms1.

Explanation

Given info:

â€ƒâ€ƒp=8Ã—10âˆ’21Â kg.m.s-1

â€ƒâ€ƒh=6.63Ã—10âˆ’34Â Js-1

Formula used:

For momentum in photon, the relation between photon and wavelength is

â€ƒâ€ƒpâ‰ˆhÎ»

Or

â€ƒâ€ƒÎ»â‰ˆhp

Calculation:

Now wavelength of photon is

â€ƒâ€ƒÎ»â‰ˆ6

To determine

(b)

The energy in MeV.

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