Telescopes

• How do different frequencies of EM radiation help us in space?

  They help us find out what's going on
• What are telescopes used for?

  To observe the universe
• How do telescopes help us see distant objects clearly?

  They allow you to see distant objects clearly
• What are the types of optical telescopes?

  • Refracting telescopes
  • Reflecting telescopes
• What is the most likely type of telescope you have seen?

  Optical telescope
• What do optical telescopes detect?

  Visible light
• What do optical telescopes use to allow you to see distant objects?

  Refraction and reflection
• What do you need to know to improve image quality using telescopes?

  How to increase the aperture of the telescope
• What does increasing the aperture of a telescope do?

  It increases the diameter of the objective lens
• What is the effect of using higher quality objective lenses?

  They provide a clearer view
• What is a clearer view provided by space telescopes compared to Earth telescopes?

  Clearer view than those on Earth
• What is a challenge when detecting light from space?

  Earth's atmosphere absorbs light
• What must you do to observe frequencies absorbed by the atmosphere?

  Go above the atmosphere
• What is light pollution?

  Light thrown up into the sky
• How does light pollution affect observation?

  It makes it hard to pick out dim objects
• What can air pollution do to light from space?

  It can reflect and absorb light
• What is the best viewing condition for observing the night sky?

  In a rural area with no light pollution
• What is the effect of light pollution in urban areas?

  It makes it hard to see stars
• What is the best place to observe the night sky?

  On top of a mountain away from cities
• How can you avoid atmospheric problems when using a telescope?

  Put your telescope in space
• What are the different types of EM waves detected by telescopes?

  • Radio waves
  • Microwaves
  • Infrared
  • Visible light
  • Ultraviolet
  • X-rays
  • Gamma rays
• What were the earliest telescopes used for?

  To look at nearby objects
• What is a limitation of using visible light for detection in the universe?

  Many objects are not detectable with visible light
• What is the challenge with detecting objects in the universe?

  Many objects are not detectable using visible light
• What type of light do many objects in the universe emit?

  Invisible light
• What is the significance of using different types of EM waves?

  They allow detection of various celestial objects
• What is the main limitation of optical telescopes?

  They can only detect visible light
• Why are many objects in the universe not detectable with optical telescopes?

  They emit light outside the visible spectrum
• What is the role of optical telescopes in astronomy?

  To observe objects emitting visible light
• What is the primary function of telescopes?

  To observe celestial objects
• What is the importance of detecting different types of EM waves?

  It helps in understanding the universe better
• What is the main challenge of using optical telescopes on Earth?

  Atmospheric interference
• How does the atmosphere affect observations made with optical telescopes?

  It absorbs and scatters light
• What is the benefit of placing telescopes in space?

  They avoid atmospheric interference
• What is the significance of using different types of telescopes?

  They allow for a broader range of observations
• What is the primary purpose of telescopes in astronomy?

  To observe and study celestial objects
• Why is it important to detect different types of EM radiation?

  To gather comprehensive information about the universe
• What is the challenge of observing celestial objects from Earth?

  Atmospheric conditions can hinder visibility
• What is the main limitation of optical telescopes?

  They can only detect visible light
• Why are many objects in the universe not detectable with optical telescopes?

  They emit light outside the visible spectrum