Huygen's Principle only applies to
A. electromagnetic waves.
B. water waves.
C. sound waves.
D. all of these choices are correct
B. water waves.
Physics & Space Science
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The Hubble time is expressed as:
A) H × D. B) D/v. C) 1/H. D) H × T. E) the critical density/H.
Physics & Space Science
What are some advantages of radio telescopes over optical scopes?
What will be an ideal response?
Physics & Space Science
The most luminous objects known in the universe are
A) Seyferts. B) quasars. C) blazars. D) radio lobe galaxies. E) giant ellipticals.
Physics & Space Science
An electron has a kinetic energy that is twice its rest energy. Determine its speed
a. 0.76 c b. 0.81 c c. 0.94 c d. 0.54 c e. 0.87 c
Physics & Space Science