Solid State Physics-Diffraction Methods for Structure Determination (GATE Physics): Questions 1 - 4 of 6

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Question number: 1

» Solid State Physics » Diffraction Methods for Structure Determination

Appeared in Year: 2014

Short Answer Question▾

Write in Short

Neutrons moving with speed 103ms are used for the determination of crystal structure. If the Bragg angle for the first order diffraction is 30° , the interplanar spacing of the crystal is __________ .

(Given: mn=1.675×1027kg,h=6.626×1034Js )

Question number: 2

» Solid State Physics » Diffraction Methods for Structure Determination

Appeared in Year: 2012

MCQ▾

Question

A simple cubic crystal with lattice parameter ac undergoes transition into a tetragonal structure with lattice parameters at=bt=2ac and ct=2ac , below a certain temperature. The ratio of the interplanar spacing of (101) planes for the cubic and the tetragonal structures is –

Choices

Choice (4) Response
a.

16

b.

16

c.

38

d.

38

Question number: 3

» Solid State Physics » Diffraction Methods for Structure Determination

Appeared in Year: 2011

MCQ▾

Question

For a three –dimensional crystal having N primitive unit cells with a basis of p atoms, the number of optical branches is –

Choices

Choice (4) Response
a.

3N3p

b.

3

c.

3p

d.

3p3

Question number: 4

» Solid State Physics » Diffraction Methods for Structure Determination

Appeared in Year: 2013

MCQ▾

Question

Two gases separated by an impermeable but movable partition are allowed to freely exchange energy. At equilibrium, the two sides will have the same –

Choices

Choice (4) Response
a.

Pressure and volume

b.

Volume and energy

c.

Volume and temperature

d.

Pressure and temperature

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