Exam 14: Image Formation

A compound microscope is made with an objective lens ( = 0.90 cm) and an eyepiece ( = 1.1 cm).The lenses are separated by a distance of 10 cm.If an object is 1.0 cm in front of the objective lens, where will the final image of the eyepiece be located?

A soda straw is stuck into water at an angle of 36 $\degree$ to the vertical.Looking straight down, what does the angle of the submerged portion of the straw to the vertical appear to be?

A contact lens is made of plastic with an index of refraction of 1.50.The lens has an outer radius of curvature of +2.0 cm and an inner radius of curvature of +2.5 cm.What are the focal length and the power of the lens?

If you stand closer to a concave mirror than a distance of one focal length, the image you see is:

A magician can make a candle look as if it is burning under water by focusing light from a candle flame burning in air directly on top of an underwater candle.To do this you want to use a (Hint: eliminate those that cannot work.):

Bottles of perfume sometimes have thick glass (n = 1.5) walls which give the impression the volume is larger than it really is.Assume a cylindrical bottle with an inner radius of 1.0 cm and an outer radius of 2.0 cm.What percentage of the apparent volume is the real volume?

When you stand in front of a convex mirror, the image you see is:

A concave mirror has a focal length of 20 cm.What is the magnification if the object's distance is 100 cm?

A magnifying glass has a convex lens of focal length 15 cm.At what distance from a postage stamp should you hold this lens to get a magnification of +2.0?

An object is placed 15 cm in front of a diverging lens whose focal length is 12 cm.Where will the image be located (in cm)?

A telescope is constructed with two lenses separated by a distance of 25 cm.The focal length of the objective is 20 cm.The focal length of the eyepiece is 5 cm.Calculate the magnitude of the angular magnification of the telescope.

A concave mirror has a focal length of 20 cm.What is the position (in cm) of the resulting image if the image is inverted and four times smaller than the object?

An object 4 cm high is placed 15 cm in front of a convex mirror with a focal length of -10 cm.What is the image position (in cm)?

Of the possible statements that parallel rays are brought to a focus by a: 1) Concave mirror, 2) Convex mirror, 3) Converging lens, 4) Diverging lens, The correct answer is:

A camera has a converging lens with a focal length of 56 mm.If the f-number is 2.8, what is the diameter of the lens (in mm)?

A concave mirror with a radius of curvature of 1.0 m is illuminated by a candle located on the symmetry axis 3.0 m from the mirror.Where is the image of the candle?

The actual depth of a shallow pool 1.00 m deep is not the same as the apparent depth seen when you look straight down at the pool from above.How deep (in cm) will it appear to be? (nwater = 1.33.)

An object is placed 25 cm in front of a lens of focal length 20 cm.60 cm past the first lens is a second lens of focal length 25 cm.How far past the 25 cm lens does the final image form?

An object is placed 15 cm in front of a concave mirror with a focal length of 30 cm.What is the magnification?

A fish is 80 cm below the surface of a pond.What is the apparent depth (in cm) when viewed from a position almost directly above the fish? (For water, n = 1.33.)