Exam 36: Diffraction

A beam of white light (from 400 nm for violet to 700 nm for red) is normally incident on a diffraction grating. It produces two orders on a distant screen. Which diagram below (R = red, V = violet) correctly shows the pattern on the screen?

Consider a single-slit diffraction pattern caused by a slit of width a. There is a minimum at sin $\theta$ equal to:

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:

Which of the following is true for Bragg diffraction but not for diffraction from a grating?

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, in nm, of the incident light?

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

A beam of x rays of wavelength 0.10nm is found to diffract in second order from the face of a LiF crystal at a Bragg angle of 30 $\degree$ . The distance between adjacent crystal planes, in nm, is about:

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?

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

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:

A person with her eye relaxed looks through a diffraction grating at a distant monochromatic point source of light. The slits of the grating are vertical. She sees:

At the first minimum adjacent to the central maximum of a single-slit diffraction pattern the phase difference between the Huygens wavelet from the top of the slit and the wavelet from the midpoint of the slit is:

The diagram shows a single slit with the direction to a point P on a distant screen 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)?

Monochromatic light is normally incident on a diffraction grating. The m^th order line is at a angle of diffraction angle $\theta$ and has width w. A wide single slit is now placed in front of the grating and its width is then slowly reduced. As a result: