ISRO Scientific Assistant Physics Question Paper. We covered all the ISRO Scientific Assistant Physics Question Paper MCQs in this post for free so that you can practice well for the exam.
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ISRO Scientific Assistant Physics Objective Question Paper for Students
Electrons are accelerated to 344 volts and are reflected from a crystal. The first reflection maximum occurs when the glancing angle is 60°. Then the interplanar spacing of the crystal is
a. 0.38 Å
b. 1.2 Å
c. 0.98 Å
d. None of the above
Option a – 0.38 Å
A set of lattice planes reflects X-rays of a wavelength of 1.32 Å at a glancing angle of 9°30′. The possible spacing for this set of planes are
a. 4 Å, 8 Å, 12 Å
b. 4 Å, 2 Å, 1 Å
c. 4 Å, 5 Å, 6 Å
d. 1 Å, 2 Å, 3 Å
Option a – 4 Å, 8 Å, 12 Å
X-rays of a wavelength of 0.36 Å are diffracted in the first order at an angle of 4.8° in Bragg’s crystal spectrometer. The effective spacing of atomic layers in the crystal is
a. 2.15 Å
b. 4.5 Å
c. 3.2 Å
d. None of the above
Option a – 2.15 Å
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