As New Hampshire's only deep water ... Lighthouse, the tower was first lit in 1771, making the lighthouse over 200 years old. Here's what to know about the history of Portsmouth Harbor Light.

To investigate the reflection of light by different types of surface, and the refraction of light by different substances. Remove the block. Join the crosses to show the paths of the light rays ...

diffuse reflection happens. Instead of forming an image, the reflected light is scattered in all directions. This may cause a distorted image of the object, as occurs with rippling water ...