why can't we see a book placed behind a wooden screen?

Because the wooden screen is an opaque object not transparent if it would be transparent light would pass through it and you would be able to see the book but in this case it is an opaque object and opaque objects do not let light pass through them that is why you cannot see the book.
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Since wooden screen is opaque object, it don't let the light to pass through it and we can't see it . as for seeing through wooden screen, it must be transparent screen
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This is because wood is an opaque object and light does not passes through it.

Thus, we cannot see the book.

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because wood is an opaque object and as u know if something is placed behind opaque object it cannot be seen
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We cant see the book wehi
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We cant see the book behind a wooden screen because the wooden piece isn't transperant. If it was a window or someting other which is transparentwe can see the book through it.
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Its is because the wooden screen is opaque and light cannot pass through it  that is why you cannot see the book
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Because wodden screen is opaque and light cannot pass from it

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because we can only see through transparent objects when wood is opaque
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soriuda niruthu daa. thaanga mudiyala
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uyghj
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opaque
 
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We cannot see a book placed behind a wooden screen because the wooden screen is an opaque object and it blocks the sight.
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trthrth
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BECAUSE THE WOOD IS A OPAQUE OBJECT AND IN THE PROCESS OF OPAQUE OBJECTS IT  DOES  NOT LET LIGHT PASS SO YOU CANNOT SEE THE BOOK
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opaque
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