Questions from College Physics

Q: A photon is reflected from a mirror. True or False:

A photon is reflected from a mirror. True or False: (a) Because a photon has zero mass, it does not exert a force on the mirror. (b) Although the photon has energy, it can’t transfer any energy to the...

Q: The two lenses of a compound microscope are separated by a distance

The two lenses of a compound microscope are separated by a distance of 20.0 cm. If the objective lens produces a lateral magnification of 10.0x and the overall magnification is 115x, determine (a) The...

Q: An inquiring student makes a refracting telescope by placing an objective lens

An inquiring student makes a refracting telescope by placing an objective lens and an eyepiece at opposite ends of a 47.5-cm-long tube. If the eyepiece has a focal length of 1.50 cm, calculate (a) The...

Q: A certain telescope has an objective mirror with an aperture diameter of

A certain telescope has an objective mirror with an aperture diameter of 200. mm and a focal length of 2.00 x 103 mm. It captures the image of a nebula on photographic film at its prime focus with an...

Q: (a) Find an equation for the length L of a

(a) Find an equation for the length L of a refracting telescope in terms of the focal length of the objective fo and the magnification m. (b) A knob adjusts the eyepiece forward and backward. Suppose...

Q: Suppose an astronomical telescope is being designed to have an angular magnification

Suppose an astronomical telescope is being designed to have an angular magnification of 34.0. If the focal length of the objective lens being used is 86.0 cm, find (a) The required focal length of the...

Q: A certain telescope has an objective of focal length 1500 cm.

A certain telescope has an objective of focal length 1500 cm. If the Moon is used as an object, a 1.0-cm-long image formed by the objective corresponds to what distance, in miles, on the Moon? Assume...

Q: Astronomers often take photographs with the objective lens or mirror of a

Astronomers often take photographs with the objective lens or mirror of a telescope alone, without an eyepiece. (a) Show that the image size h’ for a telescope used in this manner is given by h’ = fh/...

Q: An elderly sailor is shipwrecked on a desert island, but manages

An elderly sailor is shipwrecked on a desert island, but manages to save his eyeglasses. The lens for one eye has a power of +1.20 diopters, and the other lens has a power of +9.00 diopters. (a) What...

Q: A person decides to use an old pair of eyeglasses to make

A person decides to use an old pair of eyeglasses to make some optical instruments. He knows that the near point in his left eye is 50.0 cm and the near point in his right eye is 100. cm. (a) What is...