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Quick Quiz 1

In a two-slit interference pattern projected on a screen, the fringes are equally spaced on the screen

(a)everywhere

(b)only for large angles

(c)only for small angles.

Quick Quiz 2

Which of the following will cause the fringes in a two-slit interference pattern to move farther apart?

(a)decreasing the wavelength of the light

(b)decreasing the screen distance L

(c)decreasing the slit spacing d

(d)Immersing the entire apparatus in water.

Quick Quiz 3

In a two-slit interference pattern projected on a screen, the fringes are equally spaced on the screen

(a)everywhere

(b)only for large angles

(c)only for small angles.

Quick Quiz 4

At dark areas in an interference pattern, the light waves have canceled. Thus, there is zero intensity at these regions and, therefore, no energy is arriving. Consequently, when light waves interfere and form an interference pattern, (a) energy conservation is violated because energy disappears in the dark areas (b) energy transferred by the light is transformed to another type of energy in the dark areas (c) the total energy leaving the slits is distributed among light and dark areas and energy is conserved.

Quick Quiz 5

One microscope slide is placed on top of another with their left edges in contact and a human hair under the right edge of the upper slide. As a result, a wedge of air exists between the slides. An interference pattern results when monochromatic light is incident on the wedge. At the left edges of the slides, there is (a) a dark fringe (b) a bright fringe (c) impossible to determine.

Course of lectures «Contemporary Physics: Part2»

Lecture №4

Diffraction Patterns and Polarization.

Introduction to Diffraction Patterns.

Diffraction Patterns from Narrow Slits.

Resolution of Single-Slit and Circular

Apertures. The Diffraction Grating. Diffraction

of X-rays by Crystals. Polarization of Light

Waves.

Introduction to Diffraction Patterns

Diffraction Patterns from Narrow Slits

a Fraunhofer diffraction pattern

(4.1)

Diffraction Patterns from Narrow Slits

Diffraction Patterns from Narrow Slits

Intensity of Single-Slit Diffraction Patterns

(4.2)

Соседние файлы в папке Lectures Physics 2