Semester 2 Review Questions

Which type of electromagnetic waves can travel the furthest, have the longest wavelengths and the lowest frequency?

• Gamma Rays

• Ultra-violet

• Infrared

• Radiowaves

Which electromagnetic waves are used in devices such as heat lamps and TV remote controls?

• Ultraviolet rays

• Infrared Rays

• Microwaves

How much of the electromagnetic spectrum is made up of visible light?

• A small portion of it

• Most of it

• All of it

• None of it

Which section of the electromagnetic spectrum is the ONLY part humans can see?

• X-Rays

• Gamma Rays

• Visible Light

• Ultraviolet Rays

Which wavelengths of the EM spectrum are dangerous to life?

• radio, micro and gamma

• gamma, infrared, and UV

• Infrared, UV and X Rays

• UV, X rays and Gamma

Electromagnetic energy travels in waves. When we describe electromagnetic waves, we often talk about the wave’s length and frequency. Which of these statements accurately describes the relationship between the wavelength and frequency of an electromagnetic wave?

• If wavelength increases, frequency increases.
• If frequency decreases, wavelength increases.
• If frequency remains constant, wavelength increases.
• If wavelength remains constant, frequency increases.

Latif wakes up one morning and sees that it is foggy outside. Which term best describes the fog he sees?

• opaque
• reflective
• translucent
• transparent

Heather puts a straw into a glass of water. She notices that the straw appears to be broken when she looks through the glass and the water from the side. Which term bestexplains why the straw looks like it is broken?

• absorption
• refraction
• scattering
• transmission

During a thunderstorm, Sanjay saw lightning and then heard thunder 5 s later. Why does he see the lightning before he hears the thunder?

• He would have seen the lightning and heard the thunder at the same time.
• Sound travels faster than light.
• Light travels faster than sound.
• There is no reason.

A dolphin makes a noise underwater that is too high-pitched for humans to hear. What type of wave is this?

• water 
• electromagnetic
• mechanical
• microwave