Yr 10 - Universe - Telescopes

Reflecting telescopes use _______ to focus light.

• Lenses

• Flat mirrors

• Curved Mirrors

• A lens and lasers

A refracting telescope uses _______ to focus light.

• Lenses

• Mirrors

• Lasers

• Water

Modern telescopes are reflecting because: (Choose all that apply)

• Lenses are difficult to manufacture

• Lenses are heavy and fragile

• lenses absorb light that passes through them

• Lenses require only 1 perfect surface

One of the issues created by the air surrounding us is:

• Interferometry

• Reflection

• Interference

• Atmospheric blurring

What type of telescope can work 24 hours a day and even be used in the rain?

• Refracting Telescope

• Radio Telescope

• Newtonian Telescope

• Solar Telescope

Which of these light types cannot be captured by a telescope?

• Radio waves

• Microwaves

• Ultraviolet

• All of them can be captured

Which of the following does the radiation from a star tell us

• temperature
• velocity
• composition
• all of these

Why is the Hubble telescope located in space?

• So it can be closer to the stars it magnifies
• They have very large optical lenses
• So its images arent distorted by Earth's atmosphere 
• So it can be operated by astronauts 

Why are many large optical telescopes located on mountains?

• to be closer to the stars
• to be above part of the atmosphere
• because it is easier to build telescopes on mountains
• to be closer to city lights

Radio telescopes biggest advantage is that they:

• Can be used during the day
• Can be used in any type of weather
• Almost all radio waves make it to the surface
• All of these