A man is sitting in a room with a cat. The room has no window and the door is closed. The only source of light is an electric light globe.
When the light is switched on:
A. How does the light help the man see the cat?
When the light is switched off and there is no light in the room:
B. Can the man see the cat? Explain.
C. Can the cat see the man? Explain.
When the light is switched on:
A. How does the light help the man see the cat?
When the light is switched off and there is no light in the room:
B. Can the man see the cat? Explain.
C. Can the cat see the man? Explain.
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Answers & Comments
A.
the electric light globe's light is reflected by the cat and goes to the man's eyes, thus the man can see the cat.
B.
no, the man will not see the cat due to the fact that there is no light that is reflected from the cat that is reaching the man's eyes.
C.
although cat can see in low light, the current situation is absolute darkness and thus the cat cannot see the man.