Waves Light and EM Radiation

Electromagnetic energy travels in waves. These waves can vary in their frequencies and wavelengths. Electromagnetic energy is classified by the length and frequency of its wave. Of the four waves types below, which has the lowest frequency?

• Radio Wave

• Microwave

• Infra Red rays

• Visible Light

What is the name given to the lowest point of a wave?

• crest

• trough

• amplitude

• wavelength

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 best explains why the straw looks like it is broken?

• reflection

• refraction

• diffraction

• interference

The visible part of the electromagnetic spectrum consists of the colors we see in a rainbow. Which color of visible light has the longest wavelength?

• blue

• green

• red

• violet

What is a wave?

• a disturbance that transfers energy

• any type of energy that makes particles move

• any type of matter that vibrates back and forth

Tags

NGSS.MS-PS4-1

Electromagnetic radiation is energy that travels in waves. Some examples of electromagnetic radiation are visible light, radio waves, and x-rays. What is true about visible light, radio waves, and x-rays?

• Visible light, radio waves, and x-rays all have the same energy in a vacuum.

• Visible light, radio waves, and x-rays all travel at the same speed in a vacuum.

• Visible light, radio waves, and x-rays all have the same wavelength.

• Visible light, radio waves, and x-rays all have the same frequency.

Which of these properties allows you to see the moon at night, see yourself in a mirror and hear an echo

• reflection

• refraction

• diffraction

• interference

Tags

NGSS.MS-PS4-2

What is a medium?

• a disturbance in the magnetic field that is a transverse wave

• a disturbance that transfers energy from one place to another

• the material through which a wave travels like gas, liquid, solid

Tags

NGSS.MS-PS4-2

On the electromagnetic spectrum, what type of wave has the shortest wavelength?

• Gamma Rays

• white light

• a type of wave, such as a light wave or radio wave, that does not require a medium to travel

• the part of the electromagnetic spectrum that consists of waves detectable by the human eye

• all electromagnetic frequencies: including radio waves, microwaves, infrared waves, visible light, ultraviolet light, x-rays and gamma rays

Tags

NGSS.HS-PS4-1

Which electromagnetic wave can only penetrate through the surface of your skin and cause skin cancer?

• ultra violet

• infrared

• radio waves

• gamma rays

Tags

NGSS.HS-PS4-4