91Ó°ÊÓ

Young's double slit experiment breaks a single light beam into two sources. Would the same pattern be obtained for two independent sources of light, such as the headlights of a distant car? Explain.

What is the advantage of a diffraction grating over a double slit in dispersing light into a spectrum?

As the width of the slit producing a single-slit diffraction pattern is reduced, how will the diffraction pattern produced change?

Give an example of a wave characteristic of light that is easily observed outside the laboratory.

What are the advantages of a diffraction grating over a prism in dispersing light for spectral analysis?

(a) At what angle is the first minimum for 550 -nm light falling on a single slit of width \(1.00 \mu \mathrm{m} ?\) (b) Will there be a second minimum?

(a) Calculate the angle at which a \(2.00-\mu \mathrm{m}\) -wide slit produces its first minimum for \(410-\mathrm{nm}\) violet light. (b) Where is the first minimum for \(700-\mathrm{nm}\) red light?

Go outside in the sunlight and observe your shadow. It has fuzzy edges even if you do not. Is this a diffraction effect? Explain.

If a beam of white light passes through a diffraction grating with vertical lines, the light is dispersed into rainbow colors on the right and left. If a glass prism disperses white light to the right into a rainbow, how does the sequence of colors compare with that produced on the right by a diffraction grating?

Why does the wavelength of light decrease when it passes from vacuum into a medium? State which attributes change and which stay the same and, thus, require the wavelength to decrease.