Different types of spectacle lenses are used to correct ‘short sight’ and ‘long sight’. Which of these two types of lens will produce a real image?
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Question No. 2
What is the Greek word for the Sun?
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Question No. 3
What is the speed of light in a vacuum?
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Question No. 4
Light travels at different speeds in different media. What is the main consequence of this fact?
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Question No. 5
What does ‘specular’ mean?
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Question No. 6
What are the two laws of reflection?
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Question No. 7
What name is given to the problem or defect of spherical mirrors in terms of their ability to produce an image? What shape of mirror surface does not cause this problem?
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Question No. 8
What is the formula for determining the refractive index of a medium?
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Question No. 9
In optics, what is the ‘critical angle’?
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Question No. 10
What is the difference between a ‘simple lens’ and a ‘compound lens’? Why are compound lenses preferred?
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Question No. 11
Roughly how much matter does the Sun convert into energy every second?
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