Telescopes and Observing Galaxies Level 3

What is the primary purpose of a telescope when observing galaxies?

• To magnify the galaxies

• To capture images of galaxies

• To detect various wavelengths of light from galaxies

• To measure the distance between galaxies

Which type of telescope is best suited for observing galaxies in different wavelengths, such as radio waves and X-rays?

• Refracting telescope

• Reflecting telescope

• Radio telescope

• Space telescope

Why are many modern telescopes placed in space, like the Hubble Space Telescope?

• To avoid atmospheric interference

• To reduce the cost of construction

• To make them more accessible for maintenance

• To increase the gravitational pull on the telescope

Which of the following is a technique used by telescopes to study the motion of galaxies?

• Spectroscopy

• Photography

• Time-lapse imaging

• Thermal imaging

What is the term for the phenomenon where galaxies are moving away from each other, as inferred from the redshift of their light?

• Blueshift

• Greenshift

• Redshift

• Yellowshift

What does the term 'galaxy spectrum' refer to in the context of telescope observations?

• The range of colors in a galaxy

• The distribution of galaxies in the night sky

• The pattern of lines in the light emitted or absorbed by a galaxy

• The brightness of a galaxy in different wavelengths

Which telescope played a crucial role in providing evidence for the expansion of the universe by observing distant galaxies?

• Kepler Space Telescope

• Chandra X-ray Observatory

• James Webb Space Telescope

• Edwin Hubble Space Telescope

What is gravitational lensing, and how does it help telescopes study galaxies?

• It's the distortion of spacetime caused by massive objects, helping magnify and study distant galaxies.

• It's a phenomenon where galaxies emit gravitational waves, allowing telescopes to detect them.

• It's a technique where telescopes use artificial lenses to focus on specific regions of a galaxy.

• It's a method to reduce the gravitational pull on telescopes, improving their stability.

Which type of telescope is most effective for observing galaxies at radio wavelengths?

• Refracting telescope

• Reflecting telescope

• Infrared telescope

• Radio telescope

How do telescopes utilize multi-wavelength observations to gain a comprehensive understanding of galaxies?

• By capturing images in different colors

• By observing galaxies at various points in time

• By detecting different types of radiation, such as visible light, radio waves, and X-rays

• By measuring the rotation speed of galaxies