Cal is viewing the Moon with his new telescope, using a 10-mm focal length eyepiece. For greater detail, he wishes to double the magnification of his telescope.
An eyepiece having which one of the following characteristics will accomplish this for him? A) 40 diopters
B) 8 mm
C) 12 mm
D) 200 diopters
E) 5 diopters
Question 2
A runner runs around a track consisting of two parallel lines 96 m long connected at the ends by two semicircles with a radius of 49 m. She completes one lap in 100 seconds. What is her average speed?
A) 2.5 m/s
B) 5.0 m/s
C) 10 m/s
D) 0 m/s
E) 1.3 m/s
Hubble Telescope in 2009
Luna, the Moon, from a 1550 edition of Guido Bonatti's Liber astronomiae.
Earth and the Moon
Replica of Newton’s Reflecting Telescope
Essentials of a Refracting Telescope
Galileo Telescope.