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1. An candle is 60 cm in front of a blank white screen. You place a...

1. An candle is 60 cm in front of a blank white screen. You place a converging lens with focal length of 10 cm between the candle and the screen. How far should you place the lens from the candle so your image is focused on the screen and is as large as possible.

2. Light is traveling from the core of a fiber optics cable (n=2.0) to its surrounding cladding (n=3.2). If the incident light makes a 40 degree angle with the normal, will it undergo total internal reflection? What about 50 degrees? 60 degrees?

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