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Author Question: The magnetic force between parallel wires is used by the National Bureau of Standards to define the ... (Read 44 times)

809779

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on: Jul 27, 2018
The magnetic force between parallel wires is used by the National Bureau of Standards to define the
 
  A) Newton.
  B) Tesla.
  C) square-meter.
  D) Ampere.
  E) Coulomb.

Question 2

Why do large aperture telescopes use a mirror instead of a lens to focus light?
 
  What will be an ideal response?


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dominiqueenicolee

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

D

Answer to Question 2

Large mirrors are much cheaper than lenses (the largest lens has a 1 m diameter) and mirrors have an added advantage of no chromatic aberration.


809779

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Reply 2 on: Jul 27, 2018
Excellent

dawsa925

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Reply 3 on: Yesterday
Wow, this really help

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