(a) If you hold a mirror in front of you in a completely dark room, can you see your image in the mirror? Give reason for your answer.
(b) What are the three things required to observe a shadow?
(a) No image can be seen in the mirror because there is no light to be reflected by mirror.
(b) We require three thing to observe a shadow: (i) a source of light (ii) an opaque object (to obstruct the path of light), and (iii) a screen on which the shadow can be seen.
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