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Author Question: Why is the bright yellow disk of the Sun, the photosphere, cooler than the areas both above and ... (Read 46 times)

K@

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on: Jul 27, 2018
Why is the bright yellow disk of the Sun, the photosphere, cooler than the areas both above and below it?
 
  What will be an ideal response?

Question 2

How can you determine the distance to a spacecraft from the time it takes its radio signal to reach Earth?
 
  What will be an ideal response?


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tennis14576

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Reply #1 on: Jul 27, 2018
Answer to Question 1

The photosphere radiates light which carries away energy

Answer to Question 2

In a vacuum, all electromagnetic radiation, including radio waves, travel at the same speed: 300,000 km/s. Measuring the time it takes the radio signal to reach us and multiplying by 300,000 km/s gives the distance to the spacecraft.


K@

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Reply 2 on: Jul 27, 2018
Thanks for the timely response, appreciate it

debra928

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Reply 3 on: Yesterday
Wow, this really help

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