Phys 101 Lecture

Which of the following IS NOT a behavior that light waves can undergo when they reach a boundary between two media?

• stopping at the edge of the boundary

• reflection off of the boundary

• transmission into the boundary

• refraction through the boundary

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NGSS.MS-PS4-2

Reflection is to bouncing as refraction is to:

• bending.

• breaking.

• dissipating.

• halting.

This drawing illustrates the ________________________ of a light wave.

• refraction

• reflection

• diffraction

• dispersion

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NGSS.MS-PS4-2

What does LASER stand for?

• Light Amplification by Stimulated Emission of Radiation

• Light Alternation of Static Electromagnetic Radiation

• Limited Alteration of Simulated Electron Radii

• Long-Term Allocation of Substantial Energy Resources

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NGSS.HS-PS4-3

NGSS.HS-PS4-5

Suppose you shine a laser directly at a mirror so that the laser strikes it perpendicularly. The angle of reflection is 0.5°. What does this tell you about the mirror?

• The mirror’s surface is not perfectly flat. It is angled 0.5° in the location that the laser is striking.

• The incident light ray struck the mirror at a 0.5^o angle.

• 99.5% of the ray transmitted through the mirror while only 0.5% of the ray actually reflected.

• The mirror is cracked and angles upward at 0.5^o.

Who built the first laser, and when?

• Theodore H. Maiman in 1960

• Wernher Von Braun in 1944

• Albert Einstein in 1915

• Neils Bohr in 1935

Which of the following IS NOT a component of a laser?

• fuel injector

• gain medium

• high reflector

• output coupler

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NGSS.HS-PS4-3

When a light ray strikes a smooth, flat surface, what is the relationship between the angle of incidence and the angle of reflection?

• They are equal.

• The angle of incidence is twice that of the angle of reflection.

• The angle of reflection is twice that of the angle of incidence.

• They combine to add up to 180^o.

Tags

NGSS.MS-PS4-2

In this diagram, which is the angle of incidence?

• Angle A

• Angle B

• Angle C

• Angle D

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NGSS.MS-PS4-2

A concave mirror is shaped like the inner surface of a sphere. How do you think light rays will reflect off a concave mirror?

• Reflected rays converge toward the center line of a concave mirror.

• Reflected rays diverge away from the center line of a concave mirror.

• Reflected rays reflect straight back at the angle that they came in.

• Reflected rays are absorbed by a concave mirror.