Wednesday
April 1, 2015

Homework Help: math

Posted by SABRINA on Monday, August 27, 2012 at 10:46am.

a circular opaque disk, 25 cm in diameter, is set up 30 cm from a circular source of light of diameter 40 cm. Ascreen is placed 30 cm beyond the opaque disk. Describe, giving dimensions, the nature of the shadow on the screen.

Ok, I have drawn a sketch and can say that the shadow formed is the umbra which is in the middle surrounded by 2 other sections called penumbra.
how do i calculate the shadow?

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

maths - please help A circular opaque disk, 25 cm in diameter, is set up 30 cm ...
maths/physics - Need help..... A circular opaque disk, 25 cm in diameter, is set...
maths - Can someone help please? A circular opaque disk, 25 cm in diameter, is ...
maths-help please? - A cicular opaque disk, 25cm in diameter, is set up 30 cm ...
maths/physics - Please I need some help with this question A cicular opaque disk...
Physics - A flat uniform circular disk (radius = 2.10 m, mass = 1.00 102 kg) is ...
Physics - A solid cylindrical disk has a radius of 0.18 m. It is mounted to an ...
physics - A solid cylindrical disk has a radius of 0.17 m. It is mounted to an ...
physics - A thin, light string is wrapped around the rim of a 4.00kg solid ...
physics - A solid cylindrical disk has a radius of 0.16 m. It is mounted to an ...

Members