The ideal shape for the primary mirror of a telescope is

a. concave circular.
b. convex circular.
c. concave parabolic.
d. convex parabolic.
e. plane.


c

Physics & Space Science

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Diffraction is evident when a wave passes

A) through a small opening. B) the edge of an object. C) both of these D) neither of these

Physics & Space Science

An atom has completely filled inner shells and a single valence electron in an excited p state. The filled inner shells have an orbital momentum equal to zero

What is the magnitude of the orbital angular momentum L of the atom? A) 1.4? B) 2.0? C) 1.7? D) 1.0? E) 1.2?

Physics & Space Science

Olympus Mons and Maxwell Mons are both:

A) large features on the surface of Mars. B) features visible from Earth. C) dormant volcanoes. D) shield volcanoes. E) the two largest known volcanoes in the solar system.

Physics & Space Science

In an ideal transformer, how many turns are necessary in a 110-V primary if the 24-V secondary has 100 turns?

A) 458 B) 240 C) 110 D) 22

Physics & Space Science