Week 6 - Light Waves

Light travels as a __ wave

• Compression

• Transverse

Which number is pointing to the trough?

• 1
• 2
• 3
• 4

Which number is pointing to the crest?

• 1
• 2
• 3
• 4

Which number on the diagram shows the wavelength?

• 1
• 2
• 3
• 4

The bouncing back of a light ray after hitting a surface is known as...

• diffraction
• refraction
• rebounding
• reflection

Students place a pencil in a glass of water as shown. The pencil in the water looks broken because —

• water can dissolve pencils
• water is colder than air
• light bends when it enters the water
• light is absorbed when it hits the glass

Which of these correctly shows how light acts when it hits a mirror?

• F
• G
• H
• J

Which of the following would reflect rather than refract light?

• Magnifying glass
• Mirror 
• Prism
• Lens

Two flashlights are turned on. The light rays they create are shown in the diagram. These light rays best illustrate that —

• both rays are reflected
• both rays are refracted
• Ray 1 is reflected and Ray 2 is refracted
• Ray 1 is refracted and Ray 2 is reflected

A shiny aluminum screen can be placed on the windshield of a parked car. This screen helps to keep the car cool because it —

• reflects the sunlight
• absorbs heat
• causes evaporation
• conducts electricity