Plane Mirrors: Two plane mirrors make an angle of 30° with each other. A light ray enters the system and is reflected once off of each mirror. Through what angle is the ray turned?

A. 60°
B. 90°
C. 120°
D. 150°


Answer: A

Physics & Space Science

You might also like to view...

The amount of energy emitted by a star each second is the ________ and is measured in ________.

A. apparent brightness; degrees K B. apparent brightness; watts C. luminosity; watts D. temperature; degrees K

Physics & Space Science

The numbers in front of the formulas in a chemical

equation are referred to as a) subscripts. b) superscripts. c) coefficients. d) common denominators.

Physics & Space Science

Which of the following best describes how the greenhouse effect works?

A) Greenhouse gases absorb X-rays and ultraviolet light from the Sun, and this absorbed radiation then heats the atmosphere and the surface. B) A planet's surface absorbs visible sunlight and returns this absorbed energy to space as infrared light. Greenhouse gases slow the escape of this infrared radiation, which thereby heats the lower atmosphere. C) Greenhouse gases absorb infrared light coming from the Sun, and this absorbed sunlight heats the lower atmosphere and the surface. D) The greenhouse effect is caused primarily by ozone, which absorbs ultraviolet light and thereby makes the atmosphere much hotter than it would be otherwise.

Physics & Space Science

A blue shift for light indicates that the light source is moving

A) toward you. B) away from you. C) both of these D) neither of these

Physics & Space Science