32 Questions
What type of calibration is typically used for objects with flat spectral energy distributions?
AB system
Who introduced the logarithmic scale equation for magnitudes in astronomy?
Norman Pogson
Which factor does magnitude in astronomy depend on, in addition to the physical characteristics of the object?
The transmission characteristics of the instrument
What is the usual magnitude measurement for extended objects like galaxies and nebulae?
Integrated magnitude
In which case would a star/galaxy have different magnitudes in different bands?
When observed using filters for different bands
What did William Herschel discover and measure the temperature of?
Uranus
Which type of light was detected first by infrared astronomy in the mid-1800s for quantitative science?
Infrared
What does Maxwell's Electromagnetic theory state about light in Classical Physics?
Light is a wave
In Quantum Mechanics, what is light considered as?
A particle
What determines if light exhibits features of a wave or a particle?
The method of observation
What is the relationship between the energy of a wave and its wavelength according to Classical Physics?
$E = h\lambda/c$
What is the primary function of the Hubble Guide Star Catalogue?
To catalog 500 million objects with R and B magnitudes down to magnitude 20
Which database provides information on an excess of one billion objects down to magnitude 21?
USNO-B1.0
What is the purpose of the Naval Observatory Merged Astrometric Dataset (NOMAD)?
To merge catalogues from various sources covering different bands down to mag 20
Which telescope was used for the very large and deep sky survey conducted by the Sloan Foundation?
Apache Point Observation Sloan - f/5 telescope with 3 degree field of view
What is the main feature of the USNO A2.0 database?
Covers BVRJKH bands down to mag 20
What did Heinrich Hertz study in the late 1800s?
Photoelectric effect
In which regime do UV to IR observers refer to electromagnetic waves?
Wavelength Millimeter
Which community referred to different bands depending on their research?
UV to IR observers
What late 1800s scientist is known for proposing that light is quantized into discrete packets called photons?
Albert Einstein
What type of emission does the Sun exhibit primarily, despite being expected to show continuous emission?
Bright emission lines
Which property of electrons is quantized according to the quantum theory mentioned in the text?
Spins and momentums
What is the primary purpose of the Johnson-Morgan or UBV photometric system mentioned in the text?
To classify stars based on their colors
What do negative values in the context of star magnitudes indicate?
The star is hot with most radiation coming from shorter wavelengths
Which photometric system is described as the most commonly adopted standardized system developed in 1953?
Johnson-Morgan or UBV system
What is the main purpose of celestial color indices as defined in the text?
To calculate the difference in magnitudes at two different wavelengths
In observational astronomy, what is considered the global coordinate system where any star has the same coordinates for all observations on Earth?
Right ascension and declination coordinates
What is typically used to specify a location on Earth in terms of degrees, minutes, and seconds as described in the text?
Sexidecimal notation
What error type originates from mistakes or blunders in measurements or computations according to the text?
Systematic errors
Which term best describes the difference between observed/calculated value and true value in measurements?
'Error'
'Fluctuations in readings' due to systematic errors in measurement are categorized under which type of error analysis?
'Instrument uncertainties'
Which catalog utilized Greek letters and constellation names for identifying bright stars, as mentioned in the text?
Bayer Catalogue
Test your knowledge on the electromagnetic spectrum and the quantum nature of light. Learn about the different bands of the spectrum and the concept of photons in the early 1900s.
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