How does the nature of radio waves allow a radio telescope to use ...

[Mr.Thesaxman]

How does the nature of radio waves allow a radio telescope to use a wire mesh surface?
 
  What will be an ideal response?

Question 2

Main-sequence stars have about the same density as the Sun but giant stars have very low densities.
 
  a. True
  b. False
  Indicate whether the statement is true or false

[Pswine]

Answer to Question 1

Because radio wavelengths are in the range of a few millimeters to a few tens of meters, a radio telescope dish only needs to be shaped to that level of accuracy, much less smooth than a good optical telescope. Wire mesh works well as a mirror for all the but the shortest-wavelength radio waves.

Answer to Question 2

True

[Mr.Thesaxman]

TYSM

[nathang24]

Gracias!