- #1
Mohd95
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Question about Total Internal Reflection?
My textbook says that for total internal reflection to occur 2 conditions need to be met. Light is traveling more slowly in the first medium than the second medium and no.2 is the angle of incidence must be large enough for no refraction to occur.
My question is about the first condition why does total internal reflection occur when a light ray is shined through a Glass Isoceles Right Angle Prism like the one in old submarine periscopes. I mean isn't light traveling from air to glass therefore entering from a less dense medium into a more dense medium meaning light is faster in the first medium than the second medium. I don't understand it
I need a good answer please and I am in Grade 10 so don't make it very complex
Heres the link of the prism I am alking about: http://www.gcse.com/waves/images/periscope.gif
Also Sources would be appreciated. Thank You very much
My textbook says that for total internal reflection to occur 2 conditions need to be met. Light is traveling more slowly in the first medium than the second medium and no.2 is the angle of incidence must be large enough for no refraction to occur.
My question is about the first condition why does total internal reflection occur when a light ray is shined through a Glass Isoceles Right Angle Prism like the one in old submarine periscopes. I mean isn't light traveling from air to glass therefore entering from a less dense medium into a more dense medium meaning light is faster in the first medium than the second medium. I don't understand it
I need a good answer please and I am in Grade 10 so don't make it very complex
Heres the link of the prism I am alking about: http://www.gcse.com/waves/images/periscope.gif
Also Sources would be appreciated. Thank You very much