Adaptive optics measures and cancels out all seeing distortions that are caused by turbulence in Earth's atmosphere

a. True
b. False
Indicate whether the statement is true or false


True

Physics & Space Science

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An effective theory must

A) have been proven. B) must have been around for centuries or longer. C) be continuously tested. D) include mathematical formulae.

Physics & Space Science

One kilogram is the same as

a. 1000 g. b. 1/1000 kg. c. 10,000 g. d. 0.001 g.

Physics & Space Science

A simple pendulum of length 2.00 m is made with a mass of 2.00 kg. The mass has a speed of 3.00 m/s when the pendulum is 30.0° above its lowest position

(a) What is the maximum angle away from the lowest position the pendulum will reach? (b) What is the speed of the mass when the pendulum is 45° above its lowest position?

Physics & Space Science

A hydrogen atom is excited to the n = 10 stated. It then decays to the n = 4 state by emitting a photon which is detected in a photographic plate

What is the frequency of the detected photon? The lowest level energy state of hydrogen is -13.6 eV. (h = 6.626 × 10-34 J ? s, 1 eV = 1.60 × 10-19 J) A) 3.46 × 1014 Hz B) 0.865 × 1014 Hz C) 1.27 × 1014 Hz D) 4.05 × 1014 Hz E) 1.73 × 1014 Hz

Physics & Space Science