INFRARED RADIATIONS

What is infrared radiation?

• The circulation of a fluid caused by heating it.
• Transfer of heat inside a metal.
• Heat energy transfer by electromagnetic waves
• Transfer of light energy

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NGSS.MS-PS4-1

NGSS.MS-PS4-2

All objects emit infrared radiation (T/F)

• True
• False

Infrared radiation cannot pass through a vacumn (T/F)

• True
• False

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NGSS.MS-PS4-2

The three cans were all filled with boiling water they were left for ten minutes and then the temperature of the water was measured again. In which can would the water temperature be the lowest?

• A
• B
• C
• There would be no difference.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which color has the longest waves?

• red

• orange

• yellow

• green

Good absorbers are good emitters

• TRUE

• FALSE

Metals are good conductors of heat because

• They contain large number of free electrons

• Their atoms are relatively apart

• Their atoms collide frequently

• They have reflecting surfaces

A black body does not

• Emit radiation

• Reflect radiation

• Absorb radiation

• Emit and absorb radiation

As the temperature of the black body increases the peak intensity of radiation

• Increases

• Decreases

• Remains same

Figure shows peak intensity is at :

• Shorter wavelength than it was at higher temperature

• Shorter wavelength than it was at lower temperature

• Longer wavelength than it was at lower temperature