Young placed a screen with two pin holes in it in front of a point source of light. |
Generally speaking, point source pollution is easier to regulate or control because you know the source of the pollution. |
Shadows from a point source appear parallel when projected onto a flat surface. |
The results are consistent with the predictions of continuum elasticity theory for the strain of a point source subject to an applied force. |
Illuminance is the measurement of how bright a point source of light appears to the eye. |
He also studied catacaustic curves in 1682, these being the envelope of light rays emitted from a point source after reflection from a given curve. |