Exam 36: Diffraction

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?

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

Two stars that are close together are photographed through a telescope.The black and white film is equally sensitive to all colors.Which situation would result in the most clearly separated images of the stars?

If we increase the wavelength of the light used to form a double-slit diffraction pattern:

As more slits with the same spacing are added to a multiple-slit system the lines:

The resolving power of a telescope can be increased by:

The resolving power R of a grating can have units:

A diffraction-limited laser of length ℓ 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:

At a bright diffraction line phasors associated with waves from the slits of a multiple-slit barrier:

Radio waves are readily diffracted around buildings whereas light waves are negligibly diffracted around buildings.This is because radio waves:

A parallel beam of monochromatic light is incident on a slit of width 2 cm.The light passing through the slit falls on a screen 2 m away.As the slit width is decreased:

In the equation d sin $\theta$ = m $\lambda$ for the lines of a diffraction grating, d sin $\theta$ 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 of the single-slit diffraction pattern at any angle θ is given by .For light of wavelength 480 nm falling on a slit of width 3.5 µm, what is the value of α when θ = 18°?

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

A diffraction pattern is produced on a viewing screen by illuminating a long narrow slit with light of wavelength $\lambda$ .If the slit width is decreased and no other changes are made:

Light of wavelength $\lambda$ is normally incident on some plane optical device.The intensity pattern shown is observed on a distant screen ( $\theta$ is the angle measured to the normal of the device).The device could be: