Light Energy and the Electromagnetic Spectrumec

Multiple Choice

The angle between an incoming ray (of light, sound, or other waves) and the normal, which is an imaginary line perpendicular (at 90°) to the surface at the point where the ray hits.

• angle of incidence

• angle of reflection

• angle of refraction

• none of these

Multiple Choice

What is the Law of Reflection?

• The angle of incidence equals the angle of reflection

• The angle of incidence is always greater than the angle of reflection

• The angle of incidence is always less than the angle of reflection

• The angle of incidence and reflection are unrelated

Drag and Drop

A mirror can ​

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light, but not ​

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it. A black jacket will ​

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a lot of the light that hits it.

Drag these tiles and drop them in the correct blank above

reflect

refract

absorb

Multiple Choice

A ray of light is incident on a vertical, mirrored surface such that it forms an angle of 30-degrees with the surface. Which is the angle of reflection?

• 30-degrees

• 60-degrees

• 90-degrees

• 150-degrees

Multiple Choice

Which diagram represents diffuse reflection?

• A

• B

Reorder

Reorder the following from shortest wavelength to the longest wavelength.

• gamma waves

• x-rays

• ultraviolet waves

• visible light

• infrared rays

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Multiple Choice

Which has the LONGEST wavelength and, therefore, the lowest frequency/energy

• Gamma Rays
• Radio Waves
• Visible Light
• Infrared rays

Multiple Choice

Which radiation type has the highest energy?

• gamma rays

• x rays

• microwaves

• radio waves

Multiple Choice

What type of wave is shown in the picture?

• Surface
• Transverse
• Longitudinal

Multiple Choice

This type of object lets some light through, but not all. It is not easy to see through this type of material.

• transparent
• translucent
• co-parent
• opaque

Labelling

Label the wave.

Drag labels to their correct position on the image

Compression

Rarefaction

Multiple Choice

What is the main difference between transverse and longitudinal waves?

• Transverse waves travel faster than longitudinal waves.

• Transverse waves move perpendicular to the direction of energy transfer, while longitudinal waves move parallel.

• Longitudinal waves can travel through a vacuum, but transverse waves cannot.

• Longitudinal waves have higher frequencies than transverse waves.

Multiple Choice

In longitudinal waves, how do particles vibrate?

• In a random pattern

• At 90 degrees to the wave direction

• In a circular motion

• Parallel to the wave direction

Multiple Choice

Which part of a longitudinal wave is where particles are packed closely together?

• compression
• rarefaction
• crest 
• amplitude