what makes things visible to us ? Why cannot we see a book which is placed (a) behind a wooden scrèen , and ( b) in a dark room

what makes things visible to us ? Why cannot we see a book which is pl

1.	what makes things visible to us ? Why cannot we see a book which is placed (a) behind a wooden scrèen , and ( b) in a dark room
Answer» A)Because wooden screen is OPAQUE and ANYTHING PLACED behind it is INVISIBLE cause light cannot pass through it

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what makes things visible to us ? Why cannot we see a book which is placed (a) behind a wooden scrèen , and ( b) in a dark room

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