Astronomy Review Questions

Front

What is the wavelength of the longest wavelength light visible to the human eye?

Back

700 nm

Front

What is the wavelength of the shortest wavelength light visible to the human eye?

Back

400 nm

Front

Violet light has a wavelength of approximately _____________.

Back

400 nm

Front

__________ has (have) wavelengths that are longer than visible light.

Back

Infrared radiation

Front

There are __________ nanometers in one meter.

Back

1×10^9

Front

__________ has (have) wavelengths that are shorter than visible light.

Back

Gamma-rays and Ultraviolet light

Front

Astronomers build optical telescopes on tops of mountains because

Back

there is less air to dim the light and the seeing is better.

Front

Ultraviolet radiation from a star

Back

will not penetrate Earth's atmosphere and reach the ground.

Front

A new generation of telescopes is currently being built that overcomes the limitations of the older large telescopes. Some of these new telescopes

Back

use segmented mirrors, use mirrors that are very thin, and use active optics to control the shape of the mirror.

Front

The ability of a telescope to resolve fine detail is known as the telescope’s _____________.

Back

resolving power