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Mashutka [201]
3 years ago
15

Help ASAP Answer question 3 please!!!

Physics
1 answer:
PolarNik [594]3 years ago
8 0

Answer:

the answer is ture

Explanation:

because the energy substances must absorb in order to change from liquid to gas

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An x-ray beam of wavelength 1.4×10−10m makes an angle of 20° with a set of planes in a crystal(the Bragg angle)causing first ord
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Answer:

Second order line appears at 43.33° Bragg angle.

Explanation:

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Here n is order of constructive interference, λ is wavelength of x-ray beam, d is the inter spacing distance of lattice and θ is the Bragg's angle or scattering angle.

Given :

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Substitute these value in equation (1).

1\times1.4\times10^{-10} =2d\sin20

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For second order constructive interference, let the Bragg's angle be θ₁.

Substitute 2 for n, 2.04 x 10⁻¹⁰ m for d and 1.4 x 10⁻¹⁰ m for λ in equation (1).

2\times1.4\times10^{-10} =2\times2.04\times10^{-10} \sin\theta_{1}

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then wave length is 300÷250 which give 1.2m

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