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Rashid [163]
3 years ago
15

An x-ray beam of a certain wavelength is incident on a crystal, at 30.7° to a certain family of reflecting planes of spacing 33.

4 pm. If the reflection from those planes is of the first order, what is the wavelength of the x rays?
Physics
2 answers:
marissa [1.9K]3 years ago
4 0

Answer:

The wavelength of the x rays is 34.104 pm

Explanation:

Given data:

θ = incidence angle = 30.7°

d = space between planes = 33.4 pm = 33.4 x10⁻¹²m

According Bragg's expression:

n\lambda =2dsin\theta \\n=1,first-order\\\lambda =  2dsin\theta\\\lambda =2*33.4*sin30.7=34.104pm

klemol [59]3 years ago
3 0

Answer:

λ=34.068pm

Explanation:

Wavelength λ=2dsinθ

λ=2(33.4pm)sin30.7

λ=2(33.4pm) * 0.510

λ=66.8* sin30.7

λ=66.8*0.510

λ=34.068pm

X-rays are usually produced by charged particles that are accelerating or decelerating such as a beam of electrons striking a metal plate in an X-ray tube.

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