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P6: Quiz 9
P6: Quiz 9
1)
a) Is infrared a transverse or longitudinal wave? Explain your answer.
b) If we had two identical objects at different temperatures, would the cooler or hotter object emit more infrared radiation?
c) Out of light and dark surfaces (at the same temperature), which would emit more infrared radiation?
d) Out of shiny and matt surfaces (at the same temperature), which would emit more infrared radiation?
2) We can investigate the amount of infrared radiation that different surfaces emit by using Leslie cube. A diagram of the setup for the experiment is shown below.
a) Is infrared a transverse or longitudinal wave? Explain your answer.
b) If we had two identical objects at different temperatures, would the cooler or hotter object emit more infrared radiation?
c) Out of light and dark surfaces (at the same temperature), which would emit more infrared radiation?
d) Out of shiny and matt surfaces (at the same temperature), which would emit more infrared radiation?
2) We can investigate the amount of infrared radiation that different surfaces emit by using Leslie cube. A diagram of the setup for the experiment is shown below.
a) Explain how we can use Leslie cube to investigate the amount of infrared radiation emitted by different surfaces.
b) Explain the role of the dashed line on the heat proof mat.
c) The four different surfaces for the Leslie cube in this experiment are:
i) Which surface would you expect to emit the most infrared radiation?
ii) Which surface would you expect to emit the least infrared radiation?
3)
a) Out of light and dark surfaces (at the same temperature), which would absorb more infrared radiation?
b) Out of shiny and matt surfaces (at the same temperature), which would absorb more infrared radiation?
4) We can investigate the amount of infrared radiation that different substances absorb by using the apparatus below.
b) Explain the role of the dashed line on the heat proof mat.
c) The four different surfaces for the Leslie cube in this experiment are:
- Dark matt surface
- Light matt surface
- Dark shiny surface
- Light shiny surface
i) Which surface would you expect to emit the most infrared radiation?
ii) Which surface would you expect to emit the least infrared radiation?
3)
a) Out of light and dark surfaces (at the same temperature), which would absorb more infrared radiation?
b) Out of shiny and matt surfaces (at the same temperature), which would absorb more infrared radiation?
4) We can investigate the amount of infrared radiation that different substances absorb by using the apparatus below.
One of the metal plates is dark matt and the other is light shinny.
a) Explain how we can use the above apparatus to investigate which of the surfaces absorbs more infrared radiation.
b)
i) Would you expect the ball bearing to fall off of the dark matt surface or the light shiny surface first?
ii) What would your answer to part bi tell us about which surfaces are the best at absorbing infrared radiation?
a) Explain how we can use the above apparatus to investigate which of the surfaces absorbs more infrared radiation.
b)
i) Would you expect the ball bearing to fall off of the dark matt surface or the light shiny surface first?
ii) What would your answer to part bi tell us about which surfaces are the best at absorbing infrared radiation?