A horizontal ray of light on a vertical plane mirror free to turn about a horizontal axis. If the mirror turns through 20 degrees, through what angle does the reflected ray turn?
126274
You neglect to mention whether the light hits the mirror on its axis of rotation.. assuming that it does, the reflected ray is delfected through twice the nagle that the mirror moves.. thus, 40 degrees.\nLook up "optical lever"
327825
The angle of incidence inside the prism is 25. (the ray passes straight into the prism as it is incident normally).\n \n\nmu = sin a/ sin g( g is the angle in glass and a is the angle in air)\nSin a = mu sin g \n\nsin a = 1.662 sin 25\n\nr = 45 \n for 1.698 , r =45.8 = 46.
261617
Draw a straight line.\nDraw a good cuve (mirror), using a compass or a protractor(for later mark a point as centre and place the protractor on this point coinciding with the axis.)\nThe curve should be of equal length on each side of principle axis.\nNow mark the pole, radius and focal point (twice the radius).\nIn case u use protractor, take focal lenght as twice the distance between the marked pont and pole.\n\nRemember how the rays reflect/refract, and accordingly draw two incident and two reflected/refracted rays.\nGive the standard sign convention...I hope plane mirror and prism are easier.
494846
Mirrors reflect light, not vision, and the movement of light is independent of human involvement.\n\nA test would be to use a mirror to reflect daylight or artificial light from one room into another, darkened room. The light would make objects in the second room visible, without the mirror being observed, and the reflective path could be defined and verified.\n\nThis would not solve the problem of whether any object (including a reflection or a beam of light) exists when it is not seen (a seen photograph of unseen objects only confirms that the illusion of objects can be preserved and shared, as when you leave a room and come back again with a companion).\n\nThis is a philosophical question, rather than a physical one, since all events observed in life are subject to observation by the living observer.
626100
Assume you have a number line, and through the origin (0) of that number line, you place another number line perpendicular to the first, so that the second origin is the same point as the first origin.  Now you have a [rectangular/Cartesian] coordinate plane.\nYou denote a point by measuring its distance along the horizontal axis from the origin, and then measuring its distance along the vertical axis from the origin and coming up with notation like (8,4).  It's 8 "to the right" and 4 "up" from the origin.\nWe use this plane to graph lines, circles, hyperbolas, parabolas, ellipses, etc.\n\nIf you don't want to get confused, stop reading here.\n\nThere is also a [circular/polar] coordinate plane, wherein you take a number line, and chop off half of it at the origin, so it's a ray.  The first coordinate is the distance from the origin along that ray.  The second coordinate is the measure of the angle you would make with the ray, and a second ray passing starting at the origin and including the point in question [typically measured in radians, so pi radians is 180°].  Like (4, 0) is 4 units "to the right" of the origin and (4,pi) is 4 units "to the left" of the origin.\nThis coordinate system is useful for graphing spirals and other looping curves.
510304
The above solution has to be repeated again on the inside of \nthe prism just before the light comes out the other side.\n\nThe light gets refracted twice, one on contact with the prism, and\nagain before exiting the prism.  So you have to calculate the\nangle of incidence on the inside of the prism given the apex\nangle of 46 and the refracted angle of 26.36. A geometry\nproblem. Then repeat above calculation.
3202
Unless the reflective surface is perfect (which is impossible in the real world) the light will loose a little energy with each reflection (the mirror will heat up a little), and in a very short time the light will just get redder until it is merged into whatever infrared energy is inside the sphere.
163955
A. polarized in a vertical plane
3036
It's because of the minor imperfections in the placement of the mirrors. Also, because the effect can't be seen without seeing it at an angle, it causes a curve based on your viewpoint.
384126
inverse tangent of ( y / x ) = atan(40/30) = 53.13 degrees from the horizontal.\n\nEdit: the answer is not the y-direction because if it is, then the original momentum in the x-direction would have disappeared from the system.
367914
.  At any transition between materials of different density, some light will penetrate the surface, and some will reflect.  If the boundary is very smooth, a very large fraction of the light will reflect at an opposite angle from that at which it approached.\n.  Most mirrors have a double reflection; a slight reflection at the boundary between air and glass, and the major reflection, the one we actually perceive, at the boundary between the glass and the metal backing.  This is the reason that telescope mirrors have their metal coating on the front of the glass, rather than the back of the glass.  That slight reflection is heck when some of the objects you are trying to see are very faint.
151190
This sounds like a homework question?  Maybe I shouldn't give you the whole answer, so you can learn something on your own.\n\nYou are describing a Cassegrain telescope.  You can use the mirror formula to calculate the image plane for the first optic (the concave mirror) and then use that as the object plane for the second optic (the convex mirror) to get your final focal image plane.\n\nMirror Equation:  (1/So) + (1/Si) = -2/R\n\nSo = object plane (distance from object to mirror)\nSi = image plane (distance from image to mirror)\nR  = radius of curvature of mirror\n\nThe hardest part of these calculations is to use the right sign convention and to remember that the stars (initial object plane) can be treated as at infinity.
256589
(x,y) (-x,y)is a refelction over y axis. I think...
405322
_______I_____I_____()_____I__________________\n              o          f                      f \nas the law of convex lense is that is a ray is passing from optical center<that is the mid of the convex lens >then there will be no change in its direction and if another ray is paralell to principal axis <that is the long straight line>then the ray will pass from principle focus<that is f>then keep on drawing the rays until they converge together at a point that will be ur image ......after taht u can use the formula to calculate it or just measure the distances\n1/image distance+1/object distance=1/focal length\nu can change it to\n1/image distance=1/focal length-1/object distance\n                            =1/3-1/5\n                                   5-3\n                             =_____________\n                                   15\n                             =2\n                               __________\n                                   15\n now we will flip it to\n      15\n_________\n        2\nand then we will get 7.5 answer\ni hopedi helped u i m studying this too right now in 0 levels i have a lot of h.w about it today
498958
Select the object or image and then press the modify menu, transform, flip horizontal.\n\nso in the menu bar - Modify > Transform > Flip Horizontal.\n\nWould have been much easier if it said mirror :P I just figured that one out for you. I might muck around with it now. Hope this helps.
300880
When two lines cross, 4 angles are formed.  Let p be the point of intersection and move around p counterclockwise.  Call the angles w x y and z.  Note that x and y are supplementary, since they join to make one of the two lines.  Similarly, y and z are supplementary, as they join to make the other line.  Thus x+y = 180° and y+z = 180°.  This means x = z.  These are called vertical angles, on opposite sides of p.  By the same reasoning, w and y are vertical angles, and are congruent. \nWhen presented with vertical angles, one measurement determines everything.  If w is 50° then so is y, while x and z are 130°.  If w = 90° then all four angles are right angles.  In this case the lines are said to be perpendicular.
119597
That's because light reflects in the mirror just as if it's coming from the same distance the real object is but behind the mirror.  You are nor looking an image that is at the mirror distance, but really at the real object distance.