The Doppler technique for planet detection has found Earth-like planets around nearby Sun-like stars
Indicate whether the statement is true or false
FALSE
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Which of the following is true of quasars?
A) Quasar eruptions became less common as galaxies became more stable. B) Quasars did not exist until about five billion years ago. C) Quasars have comparatively smaller look-back time than most galaxies. D) Quasars eruptions were not common when galaxies were actively forming and colliding.
Helium-neon laser light (? = 6.33 × 10?7 m) is sent through a 0.30-mm-wide single slit. What is the width of the central maximum on a screen 1.0 m from the slit?
A. 2.0 cm B. 4.2 mm C. 1.1 cm D. 2.0 mm E. 0.70 mm
A spaceship approaches the Moon, traveling at 0.5c with respect to the Moon. Its crew shines a laser at the Moon. The beam strikes a lunar mirror and is reflected back to the ship. The crew on the ship will measure the speed of the reflected beam to be
A. 1.5c. B. 0.75c. C. 2.0c. D. c. E. 0.5c.
Differentiate between accuracy and precision