Exam 24: Optical Instruments

What magnifying power is attained using a compound microscope with the following specifications: objective focal length 1.50 cm,eyepiece focal length 2.42 cm,tube length 16.0 cm? Assume a near point of 25.0 cm and that the microscope is adjusted for an image at infinity.

An astronomical telescope is made with lenses of focal lengths 80.0 and 1.25 cm.What magnifying power does this telescope provide?

Which of the following is not necessarily true about the image produced by a pinhole camera?

A camera with a 50.0 mm lens is designed to focus from 1.00 m to infinity.What is the distance of travel of the lens with respect to the film plane over this range of focus?

Increasing the aperture on a camera

Two lenses,the first with focal length 10.0 cm and the second with focal length -12.5 cm,are separated by 20.0 cm.An object,2.40 cm tall,is 15.0 cm in front of the first lens.Where is the final image?

Three lenses,each of focal length 90 cm,are placed in contact.What is the focal length of the combination?

The pupil of the eye controls:

A pinhole camera is used to produce an image of a bird that is 3.8 m from the pinhole,onto the projection screen.If the size of the bird's image is 3.0% of the size of the bird,what is the distance from pinhole to screen?

The two lenses in a compound microscope work by

An astronomical telescope is made with lenses of focal lengths 80.0 and 2.00 cm.What is the barrel length on this telescope?

A TEM is a nonoptical microscope.What does TEM stand for?

Two converging lenses,the first with focal length 25 cm and the second with focal length 20 cm,are separated by 30 cm.A 4.0 cm tall object is placed 50 cm in front of the first lens.Where is the final image?

Two converging lenses,the first with focal length 25 cm and the second with focal length 20 cm,are separated by 30 cm.A 4.0 cm tall object is placed 50 cm in front of the first lens.Where is the image caused by the first lens? Give the most inclusive answer.

Two lenses,the first with focal length -12.5 cm and the second with focal length 20.0 cm,are separated by 15.0 cm.If an object is place 50.0 cm in front of the first lens,what is the total magnification?

In a Galilean telescope,the eyepiece is a diverging lens,while the objective lens is a converging lens.This means that:

A lens of focal length 10 cm is placed in contact with a lens of focal length -15 cm.What is the focal length of the combination?

A 50.0 mm lens is used to take a picture of an object 1.30 m tall located 4.00 m away.What is the height of the image on the film?

The image produced by the lens of the eye on the retina when properly focused is:

A 5.0 cm focal length lens is used as a magnifier.Assuming a near point of 25 cm,about what magnification is attained?