Lights and Lasers Test Crossword
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
                                    
 
 
Down: 1) type of energy that comes to Earth from the Sun; can damage skin and cause cancer2) when a wave is reflected, the angle of incidence is equal to the angle of reflection4) distance between one point on a wave and the nearest point just like it6) material through which a wave travels9) optical telescope that uses a double convex lens to bend the light and form an image at the focal point10) number of wavelengths that pass a fixed point each second; expressed in hertz(Hz)12) bending of a wave as it changes speed in moving from one medium to another13) light waves bounce off a surface back to the light source Across: 3) narrow beam of light traveling in a straight line5) particle that electromagnetic waves sometimes behaves like; has energy that increases as the frequency of the electromagnetic waves increase7) electromagnetic radiation with wavelengths longer than visible light but shorter than radio waves8) distance along the optical axis from the center of a mirror or lens to the focal point11) arrangement of electromagnetic waves according to their wavelengths14) device for amplifying light and focusing it into an intense beam15) lens that is thicker at its edges than in the middle16) degree to which something can be magnified17) electromagnetic waves with wavelengths that can be detected by human eyes18) transparent object that has at least one curved surface that causes light to bend19) lens that is thicker in the middle than at its edges20) point on the optical axis of a mirror or lens where rays traveling parallel to the optical axis pass through21) optical telescope that uses a concave mirror to focus light and form an image at the focal point
 

 

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