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Old Jul 18th 2017, 06:38 AM   #1
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Question Incidence angle - tilted plate

Would you please be able to assist on the following question:

A vertical plate is subjected to rays from a light source located 35 degrees above the horizon. The plate itself is tilted 12.5 degrees around its vertical axis reducing the exposure to the light source.

Find the incidence angle between the light source and the front face of the plate.

Thank you in advance!
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Old Jul 18th 2017, 07:09 AM   #2
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Originally Posted by Yanislav View Post
Would you please be able to assist on the following question:

A vertical plate is subjected to rays from a light source located 35 degrees above the horizon. The plate itself is tilted 12.5 degrees around its vertical axis reducing the exposure to the light source.

Find the incidence angle between the light source and the front face of the plate.

Thank you in advance!
Since you're relatively new here then you may not have noticed the forum requirement stated in the sticky entitled Must read before posting a problem : please show your attempt!

The Helpers and the staff of the forum have agreed that they won't give a full answer to a problem posted with no attempt (except maybe in some cases). The Helpers are here to help you to understand your weaknesses by going through the asked questions with you and not here to solve your physics problems.

It is imperative to show an attempt to a problem. If you don't know how to start, say it. Helpers will give you a push in the right direction.
The reason for this is because this is a Physics Help Forum whose purpose is to help people learn and understand physics. If we simply posted the answer to questions people ask then we run the risk of doing people's homework for them.
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Old Jul 18th 2017, 11:42 AM   #3
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maybe just a little clue

I think we can allow the clue that this is as much a geometry problem
as it is a physics problem.
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Old Jul 18th 2017, 04:07 PM   #4
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Of course. We can always allow clues and hints. Otherwise we'd be unable to help those people who don't know where to begin.
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