Exam 5: Light and Telescopes

An achromatic lens

The energy of a photon

Assume you are not near any X-ray machines. If your eyes could only see in X-rays, what color would best describe your view of your surroundings?

Chromatic aberration occurs in a ________ telescope when __________.

How do atmospheric windows limit observations made from Earth's surface?

Which kind of telescope and which instrument or technique are shown?

A ___________ has a few million light-sensitive diodes in an array typically about a half-inch square.

To keep a telescope fixed on a stellar target over time as Earth rotates, the telescope must have a/an _____________________.

The optical shape of segmented mirrors is controlled by computer-driven thrusters under the mirrors in what is called

A wave on a lake is found to have a wavelength of 2 m and a frequency of 0.3 Hz. What is the speed of this wave?

A ______________ is an array of electromagnetic radiation and a ___________ is an instrument that spreads light according to color.

If you focus a store-bought telescope at the full Moon on a typical clear night, the full Moon will be viewed as _________________.

Violet light has a wavelength of approximately _______.

If the magnification of a telescope can be changed simply by exchanging eyepieces, why wouldn't you just magnify objects to very large sizes by choosing an appropriate eyepiece?

What are sources of light pollution and how do those affect astronomical observations?

Spectrographs use a prism or a grating to spread starlight according to wavelength.

A larger-primary lens shows ____________ a smaller-primary lens.

___________ is absorbed by ozone in Earth's atmosphere that is located between 20 km and 40 km above Earth's surface. Therefore, telescopes to observe this radiation must be placed in space.

Which kind of telescope is shown and where is it located?

The ____________________ is a measure of the finest detail that can be seen in an image.