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Image Formation by Spherical Mirrors

The concave r...

Question

The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from the torch?

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Solution

If the concave reflecting surface of a torch gets rusted, the objects will not be clearly visible as it will produce a diffused beam of light with lower intensity.

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Question 17

The concave reflecting surface of a torch got rusted. What effect would this have on the beam of light from the torch?

Q. Rohan was playing with a torch. After some time the torch light got dim and eventually stopped working. Why did the torch stop working?
Assertion(A) : Potential difference between the terminals of the battery inside torch dropped to zero.
Reason(R) : The chemical inside the battery got used up.

Q. Paheli switches on a torch and aims it at a mirror. The reflected light from the mirror falls on Boojho, who is standing beside Paheli. For Boojho, what kind of objects are the torch and the mirror?

Q. Concave mirror have radius of curvature

40 c m

. At what distance from a pole of a mirror accelerated beam of light would be focus after reflection?

Q. Assertion :A laser beam of

0.2 W

power can drill holes through a metal sheet, whereas a

1000 W

torch-light cannot. Reason: The frequency of laser light is much higher than that of torch light.

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