What is the definition of reflective angles?
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DEFINITION: BUT FIRST IS THIS YOUR HOMEWORK ASSIGNMENT?? ANYWAYS DEF:THE ANGLE THAT A LIGHT RAY MAKES WITH NORMAL TO A SURFACE WHEN IT IS REFLECTED...
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It's INCIDENT not INDICENT. And it's the Law of Reflection : the angle of incidence equals the angle of reflection. So, 40 degrees.
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Properties of angles associated with parallel lines\nIf a transversal meets two parallel lines, then:\ncorresponding angles are equal.\nalternate angles are equal.\nco-interior angles are supplementary.
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depends on the first angle of refelection.
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Acute angle = Less than 90 degrees.\nRight angle = 90 degrees.\nObtuse angle = Between 90 - 180 degrees.\nStraight angle = 180 degrees.\n\nSo the answer is yes. And no, it is not considered an obtuse angle.
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This phenomenon is call total internal reflection.\nThe theory explaining the phenomenon is detailed in most good physics optics textbooks.
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First realize that since the beam is passing through something, reflection has nothing to do with it.  The only possible answer is the one that mentions refraction.
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The best simple example is the pinhole camera. An light-tight box coated black on the inside to stop reflection, with photographic paper on 1 side and a pin-hole in foil on the other side. Set up the camera and hold it steady for a short period (about a minute, experimentation required) with the pinhole exposed. When you develop the paper you will get a reasonably well focussed image that is inverted. Light from each point on the subect could pass into the camera through only 1 point, the pin-hole, and only land on 1 point of the paper. Light from the left passed through and landed on the right side of the paper and vice-versa.\n\nTo make a camera using lenses and mirrors requires far greater precision as lenses and mirrors focus light. Light from each point of the subject lands on all parts of the lens but converges to a single point again on the film. If the lens is not properly shaped, aligned and distanced from the film, the image will be out of focus. The use of mirrors and lenses allows the image to be recorded the right way around.
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Refracted light rays bend toward the normal when the material being entered has a higher index of refraction then the material you are coming from.  Reflected light behaves according to total internal reflection, and bounces off the surface at the same angle that it approached at, much like skipping a stone off a lake's surface.  Check out snell's law on wikipedia for more.
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I think he means like, math-related reflections.\n\nA reflection is like a flip of the figure.
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Right Angle - An angle that measures 90°.\nAcute Angle - An angle the measures less than 90°.\nObtuse Angle - An angle that measures more than 90° and less than 180°.\nStraight Angle - An angle that measures 180°.\nReflex Angle - An angle that measures more that 180°.\nCongruent Angles - Angles that have the same measure.\nAdjacent Angles - Angles that share a common vertex and edge.\nComplementry Angles - Two angles whose measures add to 90°.\nSupplementary Angles - Two angles whose measures add to 180°.
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when light is travelling in a optically denser medium to a rarer medium, hte angle of incidence corresponding to which angle of refraction is 90 degrees is called critical angle for the pair of media.
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If you are given the arc length of s,\n\nThe angle may be found by\n\ns/(2*PI*r) * 360 degrees.
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2 rays with a common endpoint create an angle. If the angle is a straight angle (180 degrees), then they will form a line.
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A common end point of the rays (lines) that form an angle. \n\nTherefore a triangle has three vertices and a rectanle has four.
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reflection simply means rotation by an angle of 180 deg. about a axis perpendicular to the plane of mirror.So, when you perform this rotation on the words you can easily see that they must be displayed in the mirror backwards.
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Angles that are formed when parallel lines have a common intersecting line  (this intersecting line referred to as a transversal) Corresponding angles formed will have the same measure,alternate exterior angles formed, as well asalternate interior angles formed by the same transversal shall also be of the same measure. draw two parallel lines cross them both with a tranverse line at 45 degrees and you will be amased that all the corresponding angles will be 45 degrees. Simply mind bogling isn't it.