KPER 1200 FINAL PAPER TESTED
QUESTIONS WITH DETAILED SOLUTIONS
STUDY MATERIAL
●● 10^3
Answer: 1000
●● 10^9
Answer: 1 billion
●● 10^12
Answer: trillion
●● 10^-12
Answer: 1/trillion
●● When you multiply exponents
Answer: Add them
●● when you divide exponents
Answer: subtract them
,●● when you raise exponents to a power
Answer: multiply them
●● Ratios trick
Answer: You can eliminate constants and units by comparing quantities
as a ratio.
●● Light is...
Answer: a wave AND a particle.
●● Discrete particles of light are called
Answer: photons
●● speed of light
Answer: c=3 x 10^8 m/sec
●● Light spectrum wavelengths (longest to shortest)
Answer: radio, microwave, infrared, visible, UV, X-ray, gamma ray
●● "redder" light
Answer: means long (large) wavelength, low frequency, and low energy
,●● "bluer" light
Answer: means small wavelength, high frequency, and high energy
●● Properties of light
Answer: wavelength, frequency, color, and photon energy all describe
the same property of light in different ways
●● Astronomical Unit (AU)
Answer: 1.5 x 10^8 km
average Earth-Sun distance
most useful measure for Solar System
●● larger distances than the solar system are based on
Answer: speed of light, because all light travels at a constant speed in
space.
●● How is looking into space like looking into the past?
Answer: Farther away objects are being viewed at an earlier time.
●● Light-year (ly)
Answer: ~10 trillion km
the distance light travels in a year
, ●● parsec (pc)
Answer: the distance such that an object has parallax angle of 1 arcsec,
or 3.26 light years
●● 1 arcsec
Answer: 3.26 light years
●● distance (pc)
Answer: 1/parallax angle
●● radio waves
Answer: longest wavelengths, centimeters to kilometers. emitted by the
cold, very hot, and very strange situations.
●● infrared waves
Answer: redder than red. 1mm to 750nm. atoms, molecules, warm
objects, or 100-1000K.
●● microwaves
Answer: boundary of infrared and radio waves. 1cm to 1mm. very cold
objects, or objects less than 30K.
QUESTIONS WITH DETAILED SOLUTIONS
STUDY MATERIAL
●● 10^3
Answer: 1000
●● 10^9
Answer: 1 billion
●● 10^12
Answer: trillion
●● 10^-12
Answer: 1/trillion
●● When you multiply exponents
Answer: Add them
●● when you divide exponents
Answer: subtract them
,●● when you raise exponents to a power
Answer: multiply them
●● Ratios trick
Answer: You can eliminate constants and units by comparing quantities
as a ratio.
●● Light is...
Answer: a wave AND a particle.
●● Discrete particles of light are called
Answer: photons
●● speed of light
Answer: c=3 x 10^8 m/sec
●● Light spectrum wavelengths (longest to shortest)
Answer: radio, microwave, infrared, visible, UV, X-ray, gamma ray
●● "redder" light
Answer: means long (large) wavelength, low frequency, and low energy
,●● "bluer" light
Answer: means small wavelength, high frequency, and high energy
●● Properties of light
Answer: wavelength, frequency, color, and photon energy all describe
the same property of light in different ways
●● Astronomical Unit (AU)
Answer: 1.5 x 10^8 km
average Earth-Sun distance
most useful measure for Solar System
●● larger distances than the solar system are based on
Answer: speed of light, because all light travels at a constant speed in
space.
●● How is looking into space like looking into the past?
Answer: Farther away objects are being viewed at an earlier time.
●● Light-year (ly)
Answer: ~10 trillion km
the distance light travels in a year
, ●● parsec (pc)
Answer: the distance such that an object has parallax angle of 1 arcsec,
or 3.26 light years
●● 1 arcsec
Answer: 3.26 light years
●● distance (pc)
Answer: 1/parallax angle
●● radio waves
Answer: longest wavelengths, centimeters to kilometers. emitted by the
cold, very hot, and very strange situations.
●● infrared waves
Answer: redder than red. 1mm to 750nm. atoms, molecules, warm
objects, or 100-1000K.
●● microwaves
Answer: boundary of infrared and radio waves. 1cm to 1mm. very cold
objects, or objects less than 30K.
