If an incident ray makes an angle of 30 with the surface of a sheet of glass, then the angle of incidence is?
If an incident ray makes an angle of 30 with the surface of a sheet of glass, then the angle of incidence is 30
True or False
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GodThingie
on February 8th, 2012
When your talking about refraction and Snell?s law, the angle is which the light is incident on a surface is measured with respect to the normal (as opposed to the ?horizontal?).
If the angle between the incident light been and the tangent line running along the surface of the material is 30°, then the angle with respect to the normal of the surface would be 60°.
The angle with respect to the horizontal + the angle with respect to the normal must add up to be 90°.
Angle with respect to the normal = 90° – angle with respect to the horizontal.
Angle with respect to the normal = 90° – 30° = 60°.
Some diagrams to clarify,
http://abyss.uoregon.edu/~js/images/refr...
http://www.gcse.com/waves/images/refract...
http://www.mysundial.ca/tsp/images/refra...
ShoeLover
on February 8th, 2012
False, Angle of incidence is measured to the normal. So it would be 60 degrees.