91Ó°ÊÓ

Fish are hung on a spring scale to determine their mass (most fishermen feel no obligation to truthfully report the mass). (a) What is the force constant of the spring in such a scale if it the spring stretches \(8.00 \mathrm{cm}\) for a \(10.0 \mathrm{kg}\) load? (b) What is the mass of a fish that stretches the spring 5.50 \(\mathrm{cm} ?\) (c) How far apart are the half-kilogram marks on the scale?

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?

Under what circumstances is the phase of light changed by reflection? Is the phase related to polarization?

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

Under what conditions can light be modeled like a ray? Like a wave?

A bright white light under water is collimated and directed upon a prism. What range of colors does one see emerging?

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

It is weigh-in time for the local under-85-kg rugby team. The bathroom scale used to assess eligibility can be described by Hooke's law and is depressed \(0.75 \mathrm{cm}\) by its maximum load of \(120 \mathrm{kg}\). (a) What is the spring's effective spring constant? (b) A player stands on the scales and depresses it by \(0.48 \mathrm{cm} .\) Is he eligible to play on this under- 85 kg team?

Can a sound wave in air be polarized? Explain.