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8. Explain the difference. (a) point sources and extended sources of light .(b) umbra and penumbra . |
| Answer» <html><body><p>int source of lighti) any source of light that has a negligible extent.<a href="https://interviewquestions.tuteehub.com/tag/ii-1036832" style="font-weight:bold;" target="_blank" title="Click to know more about II">II</a>) shadows are uniformly <a href="https://interviewquestions.tuteehub.com/tag/dark-943775" style="font-weight:bold;" target="_blank" title="Click to know more about DARK">DARK</a>, <a href="https://interviewquestions.tuteehub.com/tag/sharp-641613" style="font-weight:bold;" target="_blank" title="Click to know more about SHARP">SHARP</a> at the edges and bigger than the objects .<a href="https://interviewquestions.tuteehub.com/tag/iii-497983" style="font-weight:bold;" target="_blank" title="Click to know more about III">III</a>) example-stars at distant , astronomy ,etc.b) extended source of lighti) a source containing of many point sources separated laterally.ii) two types of shadows are formed-1. when source of light is one smaller than the object and number. 2.once bigger than the object.iii) examples-fluorescent bulbs, sun,etc.2. a) Umbrai) during the formation of shadow the central dark region is called Umbra.ii) no Ray of light enters into this region.b) Penumbrai) during the formation of shadow the outer less darker region is called penumbra .ii) it receives a few light of rays only and so is less darker.°ω°ФωФπωπBRAINLIEST NAHI TOH THANKS HI <a href="https://interviewquestions.tuteehub.com/tag/sahi-3003798" style="font-weight:bold;" target="_blank" title="Click to know more about SAHI">SAHI</a>...</p></body></html> | |