Dobsonian telescope

When light is reflected from a thin film of oil on a water puddle, the colors we see are produced by interference. What two waves are interfering in this situation?

Cassegrain telescope

A certain pigment absorbs green light, while reflecting blue and red wavelengths. If a surface coated with this pigment is illuminated by white light, what is the color of the light reflected from this surface? Explain.

Catadioptric

A catadioptric sensor is a visual sensor that contains mirrors (catoptrics) and lenses (dioptrics), a combined catadioptric system. These are panoramic sensors created by pointing a camera at a curved mirror.[1]

What characteristic of the electromagnetic waves predicted by Maxwell’s theory led him to suggest that light might be an electromagnetic wave? Explain.

Catadioptrictelescope

Besides passing light through a polarizing filter, is there any other way that unpolarized light can become polarized? Explain.

A double image of a dot is seen when viewing the dot through a calcite crystal. Is there any difference in the polarization of the light associated with these two images? Explain.