Some Physics Questions

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1

<p>1.Why do jewelers often examine diamonds in day light rather than with indoor light ?</p>

<li><p>Explain why the existence of cutoff frequency in the photoelectric effect more strongly favors a particle theory than a wave theory of light?</p></li>
<li><p>Darkroom for developing black and white film are sometimes lit by red bulb ? Why red?</p></li>
<li><p>If an xray photon is scattered by an electron, does its wavelength change? if so, does it increase or decrease?</p></li>
<li><p>In both photoelectric effect and in the Crompton effect we have a photon colliding with an electron causing the electron to fly off. What then is the difference between the two processes???</p></li>
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2

<p>Not really sure, but I'll give them a shot.</p>

<ol>
<li><p>Perhaps a more complete spectrum is good for some reason?</p></li>
<li><p>Having to pass a threshhold to knock off an electron implies something about the energy light has. It shows that some types of light, the higher-frequency types, have more energy than other types. The idea of some light having more energy than others can be easily explained by the idea that it is composed of particles that are each carrying more energy than other ones.</p></li>
<li><p>Might have something to do with the fact that red light is low in energy, but still visible to the human eye. A guess.</p></li>
<li><p>Maybe the photon would lose some energy in the collision, decreasing its frequency and increasing its wavelength. That's my idea, anyway.</p></li>
<li><p>Not familiar with this effect, so I'm no help here.</p></li>
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<p>I hope my uninformed answers are of any use to you =&lt;/p>

3

<p>How about you do your own homework first, and ask us to evaluate your knowledge?</p>