Sunday

December 21, 2014

December 21, 2014

Posted by **SABRINA** on Monday, August 27, 2012 at 11:28am.

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

- maths -
**SABRINA**, Monday, August 27, 2012 at 11:42ami have worked out the diameter of the umbra to be 25 cm, is this correct?....

**Answer this Question**

**Related Questions**

maths - Can someone help please? A circular opaque disk, 25 cm in diameter, is ...

maths/physics - Need help..... A circular opaque disk, 25 cm in diameter, is set...

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...

math - a circular opaque disk, 25 cm in diameter, is set up 30 cm from a ...

maths/physics - PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A ...

maths/physics - PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A ...

OPTICS - PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR ...

physics - A flat circular mirror of radius 0.150 m is lying on the floor. ...

OPTICS/PHYSICS-REALLY DO NOT UNDERSTAND THIS! - A POINT SOURCE OF LIGHT IS ...