Questions Uploads
Question
A camera is equipped with a lens with a focal length of 20 cm. When an object 2.3 m (230 cm) away is being photographed, how far from the film should the lens be placed?
_________ cm
Question
The focal length of a diverging lens is negative. If f = −21 cm
for a particular diverging lens, where will the image be formed of an object located 54 cm
to the left of the lens on the optical axis?
_____ cm to the left of the lens
What is the magnification of the image?
Question
When viewed through a magnifying glass, a stamp that is 2.9 cm
wide appears upright and 7.0 cm
wide. What is the magnification
Question
Find the ratio of their speeds immediately afterward.
v55 kg
v75 kg
=
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