Exam 36: Diffraction

In the equation sin $\theta$ = $\lambda$ /a for single-slit diffraction, $\theta$ is:

A student wishes to produce a single-slit diffraction pattern in a ripple tank experiment. He considers the following parameters: Which two of the above should be decreased to produce more bending?

A light beam incident on a diffraction grating consists of waves with two different wavelengths. The separation of the two first order lines is great if:

A point source of monochromatic light is placed in front of a soccer ball and a screen is placed behind the ball. The light intensity pattern on the screen is best described as:

Bragg's law for x-ray diffraction is 2d sin $\theta$ = m $\lambda$ . The quantity d is:

If 550-nm light is incident normally on a diffraction grating and exactly 6 lines are produced, the ruling separation must be:

Bragg's law for x-ray diffraction is 2d sin $\theta$ = m $\lambda$ , where $\theta$ is the angle between the incident beam and:

600-nm light is incident on a diffraction grating with a ruling separation of 1.7*10^-6 m. The second order line occurs at a diffraction angle of:

At the second minimum adjacent to the central maximum of a single-slit diffraction pattern the Huygens wavelet from the top of the slit is 180 $\degree$ out of phase with the wavelet from:

Figure (i) shows a double-slit pattern obtained using monochromatic light. Consider the following five possible changes in conditions: Which of the above would change Figure (i) into Figure (ii)?

The resolving power of a diffraction grating is defined by R = $\lambda$ / $\Delta$$\lambda$ . Here $\lambda$ and $\lambda$ + $\Delta$$\lambda$ are:

Diffraction plays an important role in which of the following phenomena?

Monochromatic light is normally incident on a diffraction grating that is 1 cm wide and has 10,000 slits. The first order line is deviated at a 30 $\degree$ angle. What is the wavelength of the incident light?

The dispersion D of a grating can have units:

To obtain greater dispersion by a diffraction grating:

The dispersion of a diffraction grating indicates:

The largest x-ray wavelength that can be diffracted by crystal planes with a separation of 0.316 nm is:

The diagram shows a single slit with the direction to a point P on a distant screen (not shown). At P, the pattern has its maximum nearest the central maximum. If X and Y are the edges of the slit, what is the path length difference (PX) - (PY)?

The intensity at a secondary maximum of a single-slit diffraction pattern is less than the intensity at the central maximum chiefly because:

Two nearly equal wavelengths of light are incident on an N slit grating. The two wavelengths are not resolvable. When N is increased they become resolvable. This is because: