# Speed of Light and Reflection

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## Across

1. When drawing light rays, you need a protractor and a ___
2. The distance an object is front of a plane mirror equals the distance the image appears _____ the mirror.
3. Normal lines are always ____
4. Nothing is faster than the speed of ______
5. THE RELATIONSHIP BETWEEN FREQUENCY AND WAVELENGTH
6. Velocity of light can be found by multiplying its ____ times its wavelength
7. Another word for empty space
8. When measuring angles of reflection, the curve of the protractor always points towards the
9. The angle between an angle of incidence and an angle of reflection equals 40 degrees, so the angle of reflection is _____ degrees.
10. With reflection, the angle of incidence always equals the angle of
11. This kind of reflection produces no image
12. At the end of a every light ray
13. If the angle of incidence equals 25 degrees the angle of refraction equals ______ degrees (2 words, no space)
14. Dotted line drawn perpendicular to the reflective surface

## Down

1. The _____ line of your protractor should always be placed on the normal.
2. Where can you find the speed of light if you need it? ____ table.
3. Light slows down very little when it enters _____
4. The incoming ray and reflected ray always forms the ____ V
5. Light is very slow in this medium
6. The unit of measurement for an angle
7. Ignore the angles on your protractor that are greater than ____ degrees.
8. A plane or flat mirror produces this kind of reflection
9. The image produced by a plane mirror is not real, but ___
10. When the frequency of light goes up, its wavelength goes ___.
11. Einstein called the speed of light the ____ speed limit
12. If the angle between the ray and the surface equals 20 degrees, then the angle of incidence equals.
13. The first ray in reflection is called the _____ ray

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