Quiz about Chapter 5 Telescope Test

Question 1

What are the two methods through which images can be formed in telescope design?

Accepted Answer

Reflection and refraction

Answer

Absorption and diffusion

Answer

Diffraction and dispersion

Answer

Scattering and absorption

Question 2

What is the role of a reflecting mirror in a telescope?

Accepted Answer

To focus incoming light rays

Answer

To absorb light rays

Answer

To disperse light rays

Answer

To block incoming light rays

Question 3

What is the main function of a refracting lens?

Accepted Answer

To focus light rays

Answer

To reflect light rays

Answer

To absorb light rays

Answer

To scatter light rays

Question 4

What is the main difference between reflecting and refracting telescopes?

Accepted Answer

Reflecting telescopes use mirrors, while refracting telescopes use lenses.

Answer

Reflecting telescopes use lenses, while refracting telescopes use mirrors.

Answer

Both use mirrors only.

Answer

Both use lenses only.

Question 5

In a reflecting telescope, what is the purpose of the secondary mirror?

Accepted Answer

To focus light directly to the eyepiece.

Answer

To reflect light to the primary mirror.

Answer

To magnify the image.

Answer

To block unwanted light.

Question 6

What part of the refracting telescope is responsible for focusing the starlight?

Accepted Answer

Lens

Answer

Eyepiece

Answer

Primary mirror

Answer

Secondary mirror

Question 7

Why are modern telescopes all reflectors?

Accepted Answer

Light traveling through lens is refracted differently depending on wavelength

Answer

Reflectors are cheaper to build

Answer

Reflectors are more colorful

Answer

Reflectors are easier to transport

Question 8

Why can large lenses be problematic in telescopes?

Accepted Answer

They can be very heavy and can be supported only at the edge

Answer

They are too expensive

Answer

They are difficult to clean

Answer

They are not transparent

Question 9

What are charge-coupled devices (CCDs) used for in image acquisition?

Accepted Answer

They are electronic devices that can be read out and reset quickly.

Answer

They are used to store data permanently.

Answer

They are used to print images.

Answer

They are used to enhance sound quality.

Question 10

What can image processing by computers do to images?

Accepted Answer

Sharpen images

Answer

Blur images

Answer

Change image colors

Answer

Rotate images

Question 11

What can CCDs measure in an image?

Accepted Answer

Intensity or brightness

Answer

Color

Answer

Shape

Answer

Size

Question 12

Why are larger telescopes more desirable?

Accepted Answer

They have better resolution and can gather more light.

Answer

They are easier to transport and set up.

Answer

They are less expensive to build.

Answer

They require less maintenance.

Question 13

What is one of the benefits of increased light-gathering power in telescopes?

Accepted Answer

Improves detail

Answer

Reduces color distortion

Answer

Decreases image size

Answer

Increases speed

Question 14

What does better resolving power allow you to do?

Accepted Answer

Distinguish objects that are closer together

Answer

Distinguish objects that are farther apart

Answer

Make objects appear larger

Answer

Change the color of objects

Question 15

How is resolution related to wavelength and telescope size?

Accepted Answer

Proportional to wavelength and inversely proportional to telescope size

Answer

Proportional to wavelength and proportional to telescope size

Answer

Inversely proportional to wavelength and proportional to telescope size

Answer

Inversely proportional to both wavelength and telescope size

Question 16

What causes atmospheric blurring in high-resolution astronomy?

Accepted Answer

Air movements

Answer

Light pollution

Answer

Cloud cover

Answer

Telescope design

Question 17

Which of the following is a solution to reduce atmospheric blurring by placing telescopes?

Accepted Answer

On mountaintops, especially in deserts

Answer

In urban areas

Answer

Near oceans

Answer

In valleys

Question 18

What is the purpose of active optics in telescopes?

Accepted Answer

Control mirrors based on temperature and orientation

Answer

Increase the size of the telescope

Answer

Reduce the weight of the telescope

Answer

Enhance the color of images

Question 19

How do adaptive optics help in high-resolution astronomy?

Accepted Answer

Track atmospheric changes with laser, adjust mirrors in real time

Answer

Increase the brightness of stars

Answer

Reduce the cost of telescopes

Answer

Simplify the design of telescopes

Question 20

Why are radio telescopes less sensitive to imperfections?

Accepted Answer

They use longer wavelengths.

Answer

They use shorter wavelengths.

Answer

They are made of metal.

Answer

They are smaller in size.

Question 21

What is an advantage of radio telescopes being less sensitive to imperfections?

Accepted Answer

They can be made very large.

Answer

They can be made very small.

Answer

They can detect visible light.

Answer

They can be used underwater.

Question 22

What is the diameter of the large radio telescope dish at Arecibo?

Accepted Answer

300 meters

Answer

150 meters

Answer

500 meters

Answer

100 meters

Question 23

What is one disadvantage of longer wavelengths in radio astronomy?

Accepted Answer

B) Poor angular resolution

Answer

A) Better angular resolution

Answer

C) Increased interference from clouds

Answer

D) Limited observation time

Question 24

What is an advantage of radio astronomy?

Accepted Answer

C) Can observe 24 hours a day

Answer

A) Can only observe during the day

Answer

B) Clouds, rain, and snow interfere

Answer

D) Limited to visible light

Question 25

Why don't clouds, rain, and snow interfere with radio astronomy?

Accepted Answer

B) Radio waves can pass through them

Answer

A) They block radio waves

Answer

C) They enhance radio signals

Answer

D) They reflect radio waves

Question 26

What is the main purpose of interferometry in radio telescopes?

Accepted Answer

To combine information from several widely-spread radio telescopes

Answer

To increase the size of individual telescopes

Answer

To reduce the number of telescopes needed

Answer

To focus on a single point in space

Question 27

What determines the resolution in interferometry?

Accepted Answer

The largest separation between dishes

Answer

The size of the smallest dish

Answer

The number of telescopes used

Answer

The height of the telescopes

Question 28

What is one advantage of using radio images in interferometry?

Accepted Answer

They have a resolution close to optical images.

Answer

They are easier to capture than optical images.

Answer

They require less equipment.

Answer

They are unaffected by weather conditions.

Question 29

What type of radiation can image where visible radiation is blocked?

Accepted Answer

Infrared radiation

Answer

Ultraviolet radiation

Answer

Gamma radiation

Answer

X-ray radiation

Question 30

What can generally be used with infrared radiation to image where visible radiation is blocked?

Accepted Answer

Optical telescope mirrors and lenses

Answer

Radio antennas

Answer

Satellite dishes

Answer

Microscopes

Question 31

What type of telescopes can be placed in space, such as the Spitzer telescope?

Accepted Answer

Infrared telescopes

Answer

Radio telescopes

Answer

Optical telescopes

Answer

X-ray telescopes

Question 32

Why must ultraviolet observing be done in space?

Accepted Answer

The atmosphere absorbs almost all ultraviolet rays.

Answer

Ultraviolet rays are too weak to be observed from Earth.

Answer

Ultraviolet rays are only present in space.

Answer

The atmosphere reflects ultraviolet rays back into space.

Chapter 5 Telescope Test

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