Convex lens forms virtual image when object is: MCQ with Answer and Explanation
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Question #1
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The sparkling of a diamond is primarily due to:
Correct Answer: Option B
Explanation:
Diamonds are cut in such a way that light entering them hits multiple facets from the inside at an angle greater than the critical angle (which is very low for diamond, around 24.4°). This results in multiple total internal reflections, trapping light and forcing it out of specific faces, creating a brilliant sparkle.
Diamonds are cut in such a way that light entering them hits multiple facets from the inside at an angle greater than the critical angle (which is very low for diamond, around 24.4°). This results in multiple total internal reflections, trapping light and forcing it out of specific faces, creating a brilliant sparkle.
Question #2
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Assertion (A): A convex mirror is used as a rear-view mirror. Reason (R): It gives a wider field of view.
Question #3
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A typical LED converts electrical energy into light with efficiency around
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