Astronomy Unit 5: Telescopes and waves 1/2

refracting lens

Type of lens used to bend light as it passes through it

Images can be formed through

reflection or refraction

reflecting mirror

curved mirror used to focus incoming light onto a secondary mirror

reflecting telescopes

use mirrors to reflect an image.

Refracting telescopes use

use lenses to form an image

All modern telescopes are

reflectors

Light traveling through lens is

refracted differently depending on wavelength

Some light traveling through lens is

Absorbed

Large lens can be very \______, and can only be supported \__________

heavy; at edge

A lens needs \______ acceptable surface(s)

two

A mirror needs \______ acceptable surface(s)

one

Dispersive refraction leads to

chromatic aberration

What is chromatic aberration

The effect when many colors are seen toward the edge of the microscope field of vision (like a prisim)

The Hubble Space Telescope's main mirror is \_________

2.4 m in diameter

Hubble Space Telescope's designed for \_____________________

visible, infrared, and ultraviolet radiation

Most advanced telescope

James Webb Telescope

When did the James Webb release

Christmas 2021

James Webb Telescope measures

EM waves in the red to infrared spectrum.

James Webb Telescope is positioned to

face away from warmer objects, such as Earth, Sun, Venus, Mercury, or the moon)/

Light-gathering power...

Improves detail