Electromagnetic Spectrum and Quantum Nature of Light Quiz
32 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What type of calibration is typically used for objects with flat spectral energy distributions?

  • AB system (correct)
  • Integrated magnitude system
  • Vega system
  • Zero point system

    • Who introduced the logarithmic scale equation for magnitudes in astronomy?

  • Johannes Kepler
  • Norman Pogson (correct)
  • Galileo Galilei
  • Isaac Newton

    • Which factor does magnitude in astronomy depend on, in addition to the physical characteristics of the object?

  • The transmission characteristics of the instrument (correct)
  • The object's mass
  • The observer's location
  • The time of observation

    • What is the usual magnitude measurement for extended objects like galaxies and nebulae?

    <p>Integrated magnitude</p> Signup and view all the answers

    In which case would a star/galaxy have different magnitudes in different bands?

    <p>When observed using filters for different bands</p> Signup and view all the answers

    What did William Herschel discover and measure the temperature of?

    <p>Uranus</p> Signup and view all the answers

    Which type of light was detected first by infrared astronomy in the mid-1800s for quantitative science?

    <p>Infrared</p> Signup and view all the answers

    What does Maxwell's Electromagnetic theory state about light in Classical Physics?

    <p>Light is a wave</p> Signup and view all the answers

    In Quantum Mechanics, what is light considered as?

    <p>A particle</p> Signup and view all the answers

    What determines if light exhibits features of a wave or a particle?

    <p>The method of observation</p> Signup and view all the answers

    What is the relationship between the energy of a wave and its wavelength according to Classical Physics?

    <p>$E = h\lambda/c$</p> Signup and view all the answers

    What is the primary function of the Hubble Guide Star Catalogue?

    <p>To catalog 500 million objects with R and B magnitudes down to magnitude 20</p> Signup and view all the answers

    Which database provides information on an excess of one billion objects down to magnitude 21?

    <p>USNO-B1.0</p> Signup and view all the answers

    What is the purpose of the Naval Observatory Merged Astrometric Dataset (NOMAD)?

    <p>To merge catalogues from various sources covering different bands down to mag 20</p> Signup and view all the answers

    Which telescope was used for the very large and deep sky survey conducted by the Sloan Foundation?

    <p>Apache Point Observation Sloan - f/5 telescope with 3 degree field of view</p> Signup and view all the answers

    What is the main feature of the USNO A2.0 database?

    <p>Covers BVRJKH bands down to mag 20</p> Signup and view all the answers

    What did Heinrich Hertz study in the late 1800s?

    <p>Photoelectric effect</p> Signup and view all the answers

    In which regime do UV to IR observers refer to electromagnetic waves?

    <p>Wavelength Millimeter</p> Signup and view all the answers

    Which community referred to different bands depending on their research?

    <p>UV to IR observers</p> Signup and view all the answers

    What late 1800s scientist is known for proposing that light is quantized into discrete packets called photons?

    <p>Albert Einstein</p> Signup and view all the answers

    What type of emission does the Sun exhibit primarily, despite being expected to show continuous emission?

    <p>Bright emission lines</p> Signup and view all the answers

    Which property of electrons is quantized according to the quantum theory mentioned in the text?

    <p>Spins and momentums</p> Signup and view all the answers

    What is the primary purpose of the Johnson-Morgan or UBV photometric system mentioned in the text?

    <p>To classify stars based on their colors</p> Signup and view all the answers

    What do negative values in the context of star magnitudes indicate?

    <p>The star is hot with most radiation coming from shorter wavelengths</p> Signup and view all the answers

    Which photometric system is described as the most commonly adopted standardized system developed in 1953?

    <p>Johnson-Morgan or UBV system</p> Signup and view all the answers

    What is the main purpose of celestial color indices as defined in the text?

    <p>To calculate the difference in magnitudes at two different wavelengths</p> Signup and view all the answers

    In observational astronomy, what is considered the global coordinate system where any star has the same coordinates for all observations on Earth?

    <p>Right ascension and declination coordinates</p> Signup and view all the answers

    What is typically used to specify a location on Earth in terms of degrees, minutes, and seconds as described in the text?

    <p>Sexidecimal notation</p> Signup and view all the answers

    What error type originates from mistakes or blunders in measurements or computations according to the text?

    <p>Systematic errors</p> Signup and view all the answers

    Which term best describes the difference between observed/calculated value and true value in measurements?

    <p>'Error'</p> Signup and view all the answers

    'Fluctuations in readings' due to systematic errors in measurement are categorized under which type of error analysis?

    <p>'Instrument uncertainties'</p> Signup and view all the answers

    Which catalog utilized Greek letters and constellation names for identifying bright stars, as mentioned in the text?

    <p>Bayer Catalogue</p> Signup and view all the answers

    More Like This

    Use Quizgecko on...
    Browser
    Open
    Browser
    Browser