why light can't penetrate the prism with 45 degree angle?
That still does not add that much to give a unique solution to the original question. Other details that should be given are the incident angle, the direction of the incoming ray (i.e. from above or below the normal line), and prism material.Let say, light comes with wide angle like 60 degree of normal of surface and reflect with same angle. there is a formula about that in the web page. why it can't penetrate the prism with wide angle?
Density of the material? You mean the refractive indices? Then it should also have been stated in the beginning as a condition, along with other parameters which makes the question unambiguous.one reason is difference of density...
Yep, it sure is. It is, as others have pointed out, SUCH a general question that it does not have an answer, or looked at differently, it has lots of answers. That's why everyone is pressing you to ask a more specific question that perhaps DOES have an answer.it's not a unique question in fact. it's a general question about the situation of light can't penetrate prism and reflect back. one reason is difference of density...
Light can penetrate with 0 degree of normal of surface and it is reflected with 45 degree of normal of surface. as it seems in illustration. Density of glass is more than air. I don't ask a specific question about that. my point what is the reason of reflection of light depends on angle of itIt sure can "penetrate". Look at this case:
You may have in mind something but definitely did not describe it with enough detail.
"Reflection" is not a physical quantity, so there is no mathematical relations which can associated to it. Nevertheless there are two quantities which may be related to the phenomena of light reflection: reflection coefficient and the angle of reflection. The dependency of both of these quantities on the incident angle can be derived through the Maxwell equations at the boundary of the two media.my point what is the reason of reflection of light depends on angle of it