X-rays are incident normally on a crystal of lattice constant 0.6 nm. The first order reflection of diffraction from the crystal occurs at an angle of $30^{\circ}$ . What is the wavelength of X-rays used?

3.0 nm

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0.6 nm

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1.2 nm

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2.4 nm

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Solution

The correct option is B
0.6 nm

From the Bragg's equation, $2 d s i n θ = n λ \Rightarrow 2 \times 0.6 \times s i n 30^{\circ} = 1 \times λ ∴ λ = 0.6 n m$
Hence, the corrcet choice is (b).

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X-rays are incident normally on a crystal of lattice constant 0.6 nm. The first order reflection of diffraction from the crystal occurs at an angle of $30^{\circ}$ . What is the wavelength of X-rays used?

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X-rays are incident normally on a crystal of lattice constant 0.6 nm. The first order reflection of diffraction from the crystal occurs at an angle of 30∘. What is the wavelength of X-rays used?

The correct option is B 0.6 nm From the Bragg's equation, 2d sin θ=nλ⇒2×0.6×sin 30∘=1×λ∴λ=0.6 nm Hence, the corrcet choice is (b).

X-rays are incident normally on a crystal of lattice constant 0.6 nm. The first order reflection of diffraction from the crystal occurs at an angle of $30^{\circ}$ . What is the wavelength of X-rays used?

The correct option is B
0.6 nm

From the Bragg's equation, $2 d s i n θ = n λ \Rightarrow 2 \times 0.6 \times s i n 30^{\circ} = 1 \times λ ∴ λ = 0.6 n m$
Hence, the corrcet choice is (b).