An eyeglass lens is cut with one surface having a radius R1 and the other surface having a radius R2, with R1 < R2 . Both positive radii are measured from the same side with R1 being the side closer to the eye. Is this convex-concave lens a converging lens or a diverging lens?
a. This is a converging lens.
b. This is a diverging lens.
c. This can be either a converging or diverging lens, as more information is needed for a final determination.
d. This is neither, since a lens cannot be made this way.
b
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The purity of an alloy is given by the _____________.
Fill in the blank(s) with the appropriate word(s).
A planet is furthest from the Sun in its elliptical orbit when it is at
A) apogee B) aphelion C) perigee D) perihelion
Object A has an electric charge that is 10 times larger than the charge on object B. When placed near each other, how does the force by A on B compare with the force by B on A?
A) The force by A on B is 10 times smaller. B) The force by A on B is 100 times larger. C) The force by A on B is 10 times larger. D) The force by A on B is 100 times smaller. E) They are equal.
An air mass derives its characteristics from its ______________
Fill in the blank(s) with correct word