Use Of Light In Astronomy Quiz

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Questions: 15 | Attempts: 66 | Updated: Jul 19, 2023

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Welcome to the "Use of Light in Astronomy Quiz"! As we all know, light is a fundamental tool in astronomy. It allows us to explore and understand the universe. This quiz will test your knowledge of how light is used to study celestial objects and unravel the mysteries of the cosmos.

From the basics of telescopes and the properties of light to fascinating phenomena like refraction, diffraction, and redshift, this quiz will take you through the essential concepts of light in astronomy. You will encounter questions on different types of telescopes, the electromagnetic spectrum, and the role of light in Read morerevealing the chemical composition and motion of celestial objects.

Whether you're an aspiring astronomer, a space enthusiast, or simply curious about the wonders of the universe, this quiz will challenge your understanding and expand your knowledge of how light is harnessed to unlock the secrets of the cosmos. Get ready to shine a light on your astronomical knowledge and embark on this enlightening journey through the "Use of Light in Astronomy Quiz"!

Questions and Answers

1.

What is the process by which a telescope collects and focuses light to form an image?
- A.
  
  Diffraction
- B.
  
  Reflection
- C.
  
  Refraction
- D.
  
  Absorption
Correct Answer
C. Refraction
2.

Which type of telescope uses a lens to gather and focus incoming light?
- A.
  
  Refracting telescope
- B.
  
  Reflecting telescope
- C.
  
  Radio telescope
- D.
  
  X-ray telescope
Correct Answer
A. Refracting telescope
3.

What is the term for the total amount of light energy emitted by a star or any other celestial object?
- A.
  
  Luminosity
- B.
  
  Magnitude
- C.
  
  Flux
- D.
  
  Intensity
Correct Answer
A. Luminosity

Explanation
Luminosity refers to the total amount of energy produced by different celestial bodies(stars, galaxy) per unit time and it is basically measured in joules per second or watts in SI units.

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4.

Which color has the shortest wavelength in the visible light spectrum?
- A.
  
  Red
- B.
  
  Blue
- C.
  
  Green
- D.
  
  Violet
Correct Answer
D. Violet

Explanation
Violet light has the shortest wavelength in the visible light spectrum, meaning its waves are closely spaced together. This results in violet light having higher energy photons compared to other colors in the spectrum.

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5.

What phenomenon occurs when light waves spread out and interfere with each other, producing a pattern of light and dark regions?
- A.
  
  Reflection
- B.
  
  Refraction
- C.
  
  Diffraction
- D.
  
  Scattering
Correct Answer
C. Diffraction

Explanation
Diffraction of light waves produces both constructive and destructive interference. Diffracted light incident on a screen perpendicular to gaps that diffract the light produces a pattern of bright and dark fringes.

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6.

Which type of electromagnetic radiation is commonly used in astronomy to study the cooler objects in the universe?
- A.
  
  Ultraviolet
- B.
  
  X-rays
- C.
  
  Infrared
- D.
  
  Gamma rays
Correct Answer
C. Infrared

Explanation
Infrared light is used to see through cold dust; study warm gas and dust, and relatively cool stars; and detect molecules in the atmospheres of planets and stars.

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7.

What is the term for the bending of light around an object or through a narrow slit?
- A.
  
  Reflection
- B.
  
  Refraction
- C.
  
  Diffraction
- D.
  
  Absorption
Correct Answer
C. Diffraction

Explanation
Diffraction, which is defined as the bending of light around the corners of an obstacle or aperture into the region of geometrical shadow of the obstacle, is another significant property of microstructures.

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8.

Which instrument splits light into its component colors to analyze the chemical composition of celestial objects?
- A.
  
  Gravitational wave detector
- B.
  
  Spectrometer
- C.
  
  Particle accelerator
- D.
  
  Geiger counter
Correct Answer
B. Spectrometer
9.

What is the name for the phenomenon in which light is redirected by an object's gravitational field, causing a distortion in the path of light?
- A.
  
  Doppler effect
- B.
  
  Redshift
- C.
  
  Blueshift
- D.
  
  Gravitational lensing
Correct Answer
D. Gravitational lensing
10.

Which type of light is absorbed by the Earth's atmosphere, making ground-based observations challenging?
- A.
  
  Radio waves
- B.
  
  Microwaves
- C.
  
  X-rays
- D.
  
  Ultraviolet
Correct Answer
D. Ultraviolet

Explanation
Ultraviolet light is absorbed by the Earth's atmosphere, making ground-based observations challenging.

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11.

What is the term for the change in color of an object due to its motion relative to an observer?
- A.
  
  Redshift
- B.
  
  Blueshift
- C.
  
  Green shift
- D.
  
  Violet shift
Correct Answer
B. Blueshift

Explanation
Blueshift is the term for the change in color of an object due to its motion relative to an observer.

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12.

Which space telescope has been used to discover thousands of exoplanets by detecting the slight dimming of stars when planets pass in front of them?
- A.
  
  Kepler Space Telescope
- B.
  
  Chandra X-ray Observatory
- C.
  
  Hubble Space Telescope
- D.
  
  Spitzer Space Telescope
Correct Answer
A. Kepler Space Telescope
13.

Which type of light is used to study the high-energy processes in the universe, such as black holes and supernovae?
- A.
  
  Infrared
- B.
  
  X-rays
- C.
  
  Ultraviolet
- D.
  
  Gamma rays
Correct Answer
B. X-rays
14.

What is the name for the measurement of the brightness of a star as seen from Earth?
- A.
  
  Luminosity
- B.
  
  Flux
- C.
  
  Apparent Magnitude
- D.
  
  Intensity
Correct Answer
C. Apparent Magnitude
15.

What is the term for the scattering of light by particles or molecules in the atmosphere, causing the blue color of the sky?
- A.
  
  Reflection
- B.
  
  Refraction
- C.
  
  Diffraction
- D.
  
  Rayleigh
Correct Answer
D. Rayleigh

Explanation
Rayleigh scattering of sunlight in Earth's atmosphere causes diffuse sky radiation, which is the reason for the blue color of the daytime and twilight sky, as well as the yellowish to reddish hue of the low Sun.

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Current Version
Jul 19, 2023

Quiz Edited by
ProProfs Editorial Team
Jul 19, 2023

Quiz Created by
Smriti Singh

Use Of Light In Astronomy Quiz

What is the process by which a telescope collects and focuses light to form an image?

Which type of telescope uses a lens to gather and focus incoming light?

What is the term for the total amount of light energy emitted by a star or any other celestial object?

Which color has the shortest wavelength in the visible light spectrum?

What phenomenon occurs when light waves spread out and interfere with each other, producing a pattern of light and dark regions?

Which type of electromagnetic radiation is commonly used in astronomy to study the cooler objects in the universe?

What is the term for the bending of light around an object or through a narrow slit?

Which instrument splits light into its component colors to analyze the chemical composition of celestial objects?

What is the name for the phenomenon in which light is redirected by an object's gravitational field, causing a distortion in the path of light?

Which type of light is absorbed by the Earth's atmosphere, making ground-based observations challenging?

What is the term for the change in color of an object due to its motion relative to an observer?

Which space telescope has been used to discover thousands of exoplanets by detecting the slight dimming of stars when planets pass in front of them?

Which type of light is used to study the high-energy processes in the universe, such as black holes and supernovae?

What is the name for the measurement of the brightness of a star as seen from Earth?

What is the term for the scattering of light by particles or molecules in the atmosphere, causing the blue color of the sky?