hey guys..
I want a help..
the question is .
when a spherical lens is held towards the sun and a Sharp image is formed on a piece of black paper,a hole gets burnt in the black paper, after some time.
What is the relative advantage of using a black paper rather than a white paper ?
UnknownDude:
The black paper will absorb the radiation better
The image formed is just a focus of radiation. If white paper is used, it'll reflect some radiation ofd
*off
Black paper will absorb all rhe radiation and catch fire faster
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when a spherical lens is held towards the sun and a Sharp image is formed on a piece of black paper,a hole gets burnt in the black paper, after some time.
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