Author Question: An object is placed at a distance of 50 cm from a thin lens along the axis. If a real image forms at ... (Read 109 times)

future617RT · **on:** Jul 28, 2018

An object is placed at a distance of 50 cm from a thin lens along the axis. If a real image forms at a distance of 50 cm from the lens, on the opposite side from the object, what is the focal length of the lens?
a. 25 cm
c. 200 cm
b. 22 cm
d. 90 cm

Question 2

An ideal gas is confined to a container with constant volume. The number of moles is constant. By what factor will the pressure change if the absolute temperature triples?
a. 2/3
c. 3
b. 1/3
d. 9