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Angle of incidence is equal to the angle of reflection.Always(c) Under special conditionsImage formed by a plane mirror ista virtual, behind the mirror and enlarged.(b) Sometimes(d) Never)virtual, behind the mirror and of the same size as the(c) real at the surface of the mirror and enlarged.(d) real, behind the mirror and of the same size as the obj9. Describe the construction of a kaleidoscope.0) Draw a labelled Ĺketch of the human eye. |
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Answer» 1. When light isreflectedfrom a surface, theangle of incidenceisalways equalto theangle of reflection, where bothanglesare measured from the path of the light to the normal to the surface at the point at which light strikes the surface.2. 2.Theimage formedby aplane mirroris always virtual (meaning that the light rays do not actually come from theimage), upright, and of the same shape and size as the object it is reflecting. A virtualimageis a copy of an objectformedat the location from which the light rays appear to come. 3.A kaleidoscope is composed of a hollow tube. Three mirrors are placed in the form of a triangular tube and their reflecting surfaces face each other. One end of the tube is covered with a transparent sheet and another end is covered with an opaque sheet. There is an eyehole in the opaque sheet. Bits of glass are filled inside the tube. When a kaleidoscope is turned, we get to see various patterns in it. These patterns are formed because of multiple reflections. 4. |
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