would what the nature of the shadow on the floor be if the point of source of light is replaced by a luminous disc of diameter 5 cm, whose centre lies directly above the centre of the card?

Answer 1

You'll get better responses if you follow directions and put the SUBJECT in the School Subject line.

Answer 2

And DO NOT post entire questions in all-capital letters.

You would also help yourself by telling what you do and don't understand about the assignment.

Answer 3

I did this penumbra question where you asked it first below.

Answer 4

thank you