101What is the approximate speed of light in a vacuum?
102What is the approximate speed of sound in air at room temperature?
103Why can sound not travel through a vacuum?
104Between light and sound, which one travels faster?
105According to the law of reflection, the angle of incidence is equal to what?
106Refraction of light occurs when light passes from one medium to another and undergoes what?
107A convex lens causes parallel light rays to do what after passing through it?
108A concave lens causes parallel light rays to do what after passing through it?
109Convex mirrors are commonly used as vehicle side mirrors mainly because they provide what?
110Concave mirrors are commonly used in torches and vehicle headlights mainly because they can do what?
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