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Need some help again on mirror problem.
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Here is the question: A plane mirror and a concave mirror ( f=8.0cm) are facing each other and are separated by a distance of 20 cm. An object placed 10cm in front of the plane mirror. Consider the light from the object that reflects first from the plane mirror and then from the concave mirror. Using a ray diagram drawn to scale, find the location of the image that this light produces in the concave mirror. Specify this distance relative to the concave mirror. Thanks again. |
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Re: Need some help again on mirror problem.
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on 2007-11-08 23:38:55 |
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The light coming off the plane mirror is the same as as would be emitted if there was no mirror, and the object was placed 10 cm behind where the mirror used to be. So, we can simplify the problem to be this: An object sitting 30 cm away from a concave mirror with a focal point at 8 cm. Here is an example ray trace. Here is the formula to check your answer. 
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Re: Need some help again on mirror problem.
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Ah! Awesome. Thanks. |