Unit 2

Question 1

An electromagnetic wave consists of a(n) _____ wave moving together, while being oriented 90° to each other.

Answer 1

Electrical and magnetic

Question 2

_____ means to issue forth from a center.

Answer 2

Radiate

Question 3

The _____ can collect light from very dim objects over many hours.

Answer 3

CCD and Camera

Question 4

Any heated object emits _____ radiation.

Answer 4

Infrared

Question 5

Electromagnetic waves only differ from one another in _____.

Answer 5

wavelength

Question 6

One major goal of ____ astronomy is to match detected radio wave with the conditions and processes that produce them.

Answer 6

Radio

Question 7

The front lens of a reflecting telescope is the _____ lens.

Answer 7

objective

Question 8

Who invented the compound or achromatic lens?

Answer 8

Chester Hall

Question 9

Who brought forth the electromagnetic theory of light?

Answer 9

James Maxwell

Question 10

_____ is the change in direction from one medium to another of different density.

Answer 10

Refraction

Question 11

A(n) ________ receives, amplifies, and preserves radio signals.

Answer 11

radio telescope

Question 12

The function of the _____ in a refracting telescope is to gather more light than is possible for the human eye.

Answer 12

objective lens

Question 13

_____ means pertaining to color.

Answer 13

Chromatic

Question 14

_____ is the change in light waves passing near the edges of a gap.

Answer 14

Diffraction

Question 15

Gamma rays are formed in stars’ cores as a result of _____.

Answer 15

fusion

Question 16

The modern preferred means of producing a visible spectrum is a _____. _____ occurs when all light rays cannot be brought to a single focus.

Answer 16

diffraction grating, Aberration.

Question 17

A special curve looking like the inside of a bowl is said to be _____.

Answer 17

parabolic

Question 18

____ is the distance between two equal parts on consecutive wave forms.

Answer 18

wavelength

Question 19

A photon is a unit of _____ energy.

Answer 19

radiant

Question 20

Who created the reflecting telescope because he believed chromatic aberration in refractors would never be overcome?

Answer 20

Isaac Newton

Question 21

In _____, an information processor delays signals from distant receivers so all signals arrive together.

Answer 21

Interferometry

Question 22

CCD stands for _____.

Answer 22

Charge- Coupled device

Question 23

Who proposed the multiple telescope?

Answer 23

Edward Synge

Question 24

All _____ carries clues to what sort of event produced it.

Answer 24

electromagnetic radiation

Question 25

The rear lens of a refracting telescope is the _____.

Answer 25

eyepiece

Question 26

Who discovered two of Saturn’s moons?

Answer 26

William Herschel

Question 27

A(n) _____ is an intervening substance through which an effect may be transported.

Answer 27

medium

Question 28

_____ is both a particle and a wave.

Answer 28

photon