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# Diffraction MCQ Level -2

## 10 Questions MCQ Test Topic wise Tests for IIT JAM Physics | Diffraction MCQ Level -2

Description
This mock test of Diffraction MCQ Level -2 for Physics helps you for every Physics entrance exam. This contains 10 Multiple Choice Questions for Physics Diffraction MCQ Level -2 (mcq) to study with solutions a complete question bank. The solved questions answers in this Diffraction MCQ Level -2 quiz give you a good mix of easy questions and tough questions. Physics students definitely take this Diffraction MCQ Level -2 exercise for a better result in the exam. You can find other Diffraction MCQ Level -2 extra questions, long questions & short questions for Physics on EduRev as well by searching above.
QUESTION: 1

Solution:
QUESTION: 2

Solution:

QUESTION: 3

### A narrow beam of yellow light of wavelength 600 nm is incident normally on a diffraction grating ruled 2000 lines/cm, and images are formed on a screen parallel to the grating and 1.00 m distant. Compute the distance along the screen from the central bright lined to the first-order lines.

Solution:
QUESTION: 4

Determine the ratio of the wavelengths of two spectral lines if the second-order image of one line coincides with the third-order image of the other line, both lines being examined by means of the same grating.

Solution:

The correct answer is: 3 : 2

QUESTION: 5

A thin slit produces a fuzzy shadow because of.

Solution:

QUESTION: 6

A double-slit experiment is done in the usual way with 480-nm light and narrow slits that are 0.050 cm apart. At what angle to the straight-through beam will one observe (A) the third-order bright spot and (B) the second minimum from the central maximum?

Solution:

The correct answer is: A- 0.17°, B - 0.083°

QUESTION: 7

A single slit of width 0.140 mm is illuminated by monochromatic light, and diffraction bands are observed on a screen 2.00 m away. If the second dark band is 16.0 mm from the central bright band, what is the wavelength of the light?

Solution:

The correct answer is: 560 nm

QUESTION: 8

A spectrum of the Sun’s radiation in the infrared region is produced by a grating. What is the wavelength being studied, if the infrared line in the first order occurs at an angle of 25.0° with the normal, and the fourth-order image of the hydrogen line of wavelength 656.3 nm occurs at 30.0°?

Solution:

The correct answer is: 2.22 x10-6 m

QUESTION: 9

Green light of wavelength 500 nm is incident normally on a grating, and the second- order is diffracted 32.0° from the normal. How many lines/cm are marked on the grating?

Solution:

The correct answer is: 5.30 x 10lines/cm

QUESTION: 10

Two flat glass plates are pressed together at the top edge and separated at the bottom edge by a strip of thin foil. The air wedge is examined in yellow sodium light (589 nm) reflected normally from its two surfaces, and 42 dark interference fringes are observed. Compute the thickness of the thin foil.

Solution:

The correct answer is: 12.07 μm