Infrared - Chalk Talk

Infrared light, with a longer wavelength than visible light, is divided into near, mid, and far categories. Far infrared, also known as thermal infrared, is detectable as heat and is used in thermal imaging and weather observation. Near and mid infrared do not emit heat and are used in electronic devices like remote controls. Infrared light is emitted by all animals, the Earth, the sun, and distant celestial bodies. Some animals, such as rattlesnakes and vampire bats, use infrared sensing to locate food. Although invisible to humans, infrared provides valuable environmental and astronomical information.

What is another name for far infrared radiation?

• Visible infrared

• Thermal infrared

• Microwave infrared

• Ultraviolet infrared

Which type of infrared radiation is used in remote controls?

• Ultraviolet infrared

• Far infrared

• Near infrared

• Thermal infrared

Which of the following emits infrared light?

• Only the sun

• Only animals

• All animals, the Earth, the sun, and distant stars

• Only distant stars

How do some animals use infrared sensing?

• To regulate body temperature

• To navigate in the dark

• To find food

• To communicate with each other

What can infrared information help us understand?

• The sound of waves

• The speed of light

• The environment around us and the universe

• The color of the sky