physics lecture ch 19

If your vision is improved with lenses that look like the one on the right, then you must have

. Myopia.

Jamie's far point is 30 cm from her eye, and her near point is 10 cm from her eye. To correct her vision, Jamie needs glasses that create an image of distant objects that is

At her far point

In the way that a magnifier is usually used, the object is placed

At the focal point of the lens.

Accommodation of the eye refers to its ability to

Focus on both nearby and distant objects.

A narrow beam of white light is incident at an angle on a piece of flint glass. As the light refracts into the glass,

It forms a slightly diverging cone with red rays on top, violet rays on the bottom

Your camera is focused on a distant mountain. Now you want to focus on a nearby flower. You'll need to

Move the lens farther from the film

The magnification of a microscope is increased when

The focal length of the objective lens is decreased.

If you increase the diameter of a telescope's objective lens (and, of course, increase the diameter of the tube) with no other changes, then the telescope will have

The same magnification; more light-collecting power.

The fundamental resolution of an optical instrument is set by

The wave nature of light

Two distant stars are only marginally resolved when viewed through a telescope having a 10 eyepiece and a filter that passes only light with a wavelength near 500 nm. One way to better resolve the stars would be to

View the stars using ultraviolet wavelengths.

If the near point of your eye is at 75 cm, you are

farsighted

The units of refractive power are

m-1