Test Unit 7 Light

The speed of light is about ________ in vaccum

• 3x10⁸ Km/s

• 3x10⁸ m/s

• 3x10⁸ mi/s

• None of these

Which wavelength of visible light has the lowest energy?

• Red
• Yellow
• Orange
• Blue

Why does an apple appear red?

• All colors are absorbed & none are reflected
• All colors are absorbed except for blue, which is reflected
• All colors are reflected and none are absorbed
• All colors are absorbed except for red, which is reflected

What is the distance between one peak and the next in a wave called?

• Frequency

• Amplitude

• Wavelength

• None of these

Which of the following types of radiation has the shortest wavelength and the highest frequency?

• Radio Waves
• Infrared
• Visible
• X-Rays

Which of these is NOT correct about light?

• Light travels in a straight line.

• The speed of light is the fastest in the entire universe.

• Light bends while changing the medium through which it is passing

• Light can pass through all objects

What are the two main TYPES of waves?

• Ocean and Sound
• Electromagnetic and Mechanical
• Light and Color
• Transverse and Longitudinal

The back and forth (or side to side motion of a wave) is called...

• Transverse wave
• Longitudinal wave
• Sound wave
• Electromagnetic wave

The wave with the least amount of energy is what from the electromagnetic spectrum?

• Radio
• Microwave
• Infrared
• Gamma

When light bounces back it is called...

• Reflection
• Transmission
• Refraction
• Absorption