Black Bodied Radiators

Based on the Wien's law, when the temperature increases, the phenomena that will be happen is...

• A. There is no change in the wavelength

• B. The wave length will be increase

• C. The wavelength will be decrease

• D.The frequency will be increase

• E. The frequency will be decrease

Tags

NGSS.HS-PS4-1

When the temperature of black body radiation is decrease, the maximum intensity of the radiation will be...

• A. Move to the longer wavelength

• B. Move to the higher frequency

• C. There is no change

• D. First it moves to the shorter wavelength and after that move back to the longer wavelength

• E. Depends on the condition

Tags

NGSS.HS-PS4-1

Two stars A and B emits the same amount of light. The wavelength that star A emits is longer than the wavelength that star B emits. What can you conclude from that explanation?

• A. The frequency of star A is higher than star B

• B. The frequency of star B is higher than star A

• C. The temperature of star A and star B is same

• D. The temperature of star A is higher than star B

• E. The temperature of star A is lower than star B

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

As the wavelength of the radiation decreases, the intensity of the black body radiations

• increases

• decreases

• first increases then decreases

• first decreases then increases

An iron rod is heated. The colors at different temperatures are noted. Which of the following colors shows that the iron rod is at the lowest temperature?

• red

• orange

• white

• blue

A black body is defined as a perfect absorber of radiations. It may or may not be a perfect emitter of radiations

• true

• false

Tags

NGSS.HS-PS4-3

A blackbody curve on a graph tells us how an object releases

• radio waves according to Planck's constant.

• light through a black hole's event horizon.

• radiation over different frequencies.

• heat over time.

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Blackbody curves also tell astronomers about the ___ of an object (like a star).

• rotational energy

• temperature

• distance

• composition

Tags

NGSS.HS-PS4-3

What color would this object glow if it were heated to 5,000 K?

• Green

• Yellow

• Red

• Infrared

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

Choose the correct statement of an ideal blackbody

• Emits 100% of the light it generates, but cannot absorb its own radiation

• Absorbs half of the light incident upon it and emits half of the radiation it generates

• Absorbs all light incident on it, or emits all of the radiation it generates

• Absorbs 100% of the light incident upon it, but cannot emit light of its own

Tags

NGSS.HS-PS4-3