Unit 1.2

Question 1

What is the approximate speed of light in a vacuum?

Answer 1

Approximately 186,000 miles per second.

Question 2

What type of reflection occurs when light strikes a mirror?

Answer 2

Specular

Question 3

What type of mediums transmit s light?

Answer 3

Transparent and translucent

Question 4

At what angle does a normal ray of light strike a medium?

Answer 4

Perpendicular or 90 degrees

Question 5

What problem does dispersion create in a lens design?

Answer 5

The various components of light that make up the total image will not focus at the same plane.

Question 6

Explain three things that must occur for an object to have a green appearance.

Answer 6

1. Light source must contain green wavelengths
2. Object must reflect green wavelengths
3. Object must absorb other wavelengths

Question 7

What do we call light that vibrates in only one plane?

Answer 7

Polarized