Exam 9: Optics

The Hubble Space Telescope has been repaired.

You see colors in a rainbow because of diffraction.

Light is a transverse wave.

An EM wave with a wavelength of 500 nm will be visible.

The two most common types of poor eyesight are the result of improper ______________.

A movie projector is equipped with a 0.5-meter focal length lens that is positioned 0.506 meters from the film. (a)How far from the lens must the screen be if the image on it is to be in focus? (b)How many times larger is the image than the object? (c)Is the image produced a real or a virtual image?

You do not see your image when you look at a flat rough aluminum surface because of __________.

The light directly from the Sun is

Rank the following media in order according to the speed of light in them,from slowest to fastest: vacuum,air,water and glass.

The two types of reflection are ______________ and ___________.

A one-way mirror works because __________.

A __________ lens is thinner at the center than the edges.

In the atmosphere,the intensity of scattered sunlight of longer wavelength is greater than that of shorter wavelength.

When you look into a pool of water,the depth looks less than it actually is because of

A magnifying glass with focal length 15 centimeters is placed 12 centimeters above a stamp. (a)Where is the image? (b)What is the magnification? (c)Is the image produced a real or a virtual image?

Diverging lenses have negative focal lengths.

A light ray bends when it goes from one medium to another because of diffraction.

The sky is blue due to air molecules scattering sunlight in all directions.

Two otherwise identical light waves arriving at the same point with peak matching valley undergo

Fresnel lenses are