Question

In the expression of Bragg's law which term describes the path difference?
(a) nλ
(b)2d sinθ
(c) d
(d) sinθ

Answer 1

Answer:

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Answer 2

In the expression of Bragg's law the term 'd' describes the path difference. (option(c))

• Bragg's law states that "When a beam of x-ray is incident on a crystal at an angle θ, the reflected beam of x-ray also has the same angle of scattering θ. Constructive interference will occur when path difference 'd' is equal to the whole number 'n' of the wavelength."

• The Bragg law in physics describes the relationship between the separations between atomic planes in crystals and the angles of incidence at which these planes reflect X-rays, gamma rays, and particle waves like those associated with electrons and neutrons most strongly.
• The Bragg law is helpful for calculating wavelengths and crystal lattice spacings.
• One of the flaws in Bragg's law is that it doesn't provide any data on the level of scattering for the location of electrons in the unit cell.
• For the reflection of X-rays, only the lattice planes are taken into account.

Therefore, in the expression of Bragg's law the term 'd' describes the path difference.

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