A light ray passes from air through a thin plastic slab (n = 1.77) with parallel sides. If the ray in air makes an angle of 49° with the normal after leaving the slab, what is the angle of incidence for the ray in air as it impinges upon the other side of the slab?
a. 25°
b. 49°
c. 14°
d. 28°
e. 87°
b
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In comparing the Terrestrial worlds, which planet is most similar to Earth's moon?
a. Mercury b. Venus c. Earth d. Mars e. Uranus
An object is thrown upwards with a speed of 14 m/s. How high above the projection point is it after 0.50 s?
A) 0 m B) 2.9 m C) 5.8 m D) 7.0 m E) 8.2 m
Any change of the energy of a system occurs because of
a. energy transfer across the boundaries of the system. b. combustion of fuels within the system. c. radioactive decay of elements within the system. d. all of the above. e. only (b) and (c) above.
A 4.0-cm-tall object is placed 50.0 cm from a diverging lens of focal length 25.0 cm. What is the nature and location of the image?
A) A real image, 4.0 cm tall, 20 cm other side of the object B) A virtual image, 4.0 cm tall, 20 cm other side of the object C) A virtual image, 2.0 cm tall, 10 cm other side of the object D) A virtual image, 1.3 cm tall, 16.7 cm same side as the object E) A real image, 1.3 cm tall, 16.7 cm same side as the object