Exam 36: Diffraction

The spacing between adjacent slits on a diffraction grating is 3 $\lambda$ .The deviation $\theta$ of the first order diffracted beam is given by:

In the equation d sin $\theta$ = m $\lambda$ for the lines of a diffraction grating, d sin $\theta$ is:

An x-ray beam of wavelength 3 *10^-11 m is incident on a calcite crystal of lattice spacing 0.3 nm.The smallest angle between crystal planes and the x-ray beam which will result in constructive interference is:

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

The widths of the lines produced by monochromatic light falling on a diffraction grating can be reduced by:

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:

When 450-nm light is incident normally on a certain double-slit system the number of interference maxima within the central diffraction maximum is 5.When 900-nm light is incident on the same slit system the number is:

Monochromatic plane waves of light are incident normally on a single slit.Which one of the five figures below most correctly shows the diffraction pattern observed on a distant screen?

A diffraction-limited laser of length and aperture diameter d generates light of wavelength $\lambda$ .If the beam is directed at the surface of the Moon a distance D away, the radius of the illuminated area on the moon is approximately:

In a single-slit diffraction pattern, the central maximum is about twice as wide as the other maxima.This is because:

Two slits of width a and separation d are illuminated by a beam of light of wavelength $\lambda$ .The separation of the interference fringes on a screen a distance D away is:

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

The resolving power of a telescope can be increased by:

What is the minimum number of slits required in a diffraction grating to just resolve light with wavelengths of 471.0 nm and 471.6 nm?

A mixture of 450-nm and 900-nm light is incident on a multiple-slit system.Which of the following is true?

A diffraction grating of width W produces a deviation $\theta$ in second order for light of wavelength $\lambda$ .The total number N of slits in the grating is given by:

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

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

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?

The dispersion D of a grating can have units: