Spectrospcopy Flashcards
Gravity
the force of attraction by which terrestrial bodies tend to fall toward the center of the earth.
Sun’s layers
Corona, Chromosphere, Photosphere, Convection Zone, Radaition Zone, Core
Crest
top part of the wave
Trough
bottom part of a wave
Wavelength
the distance between one wave to an adjacent wave crest
Amplitude
the distance from the middle of the wave to the top or bottom of the wave
Positive amplitude
the distance from the middle of the wave to the
wave crest
Negative amplitude
the distance from the middle of the wave to the wave trough
Radio waves
Longest wave EM wave, tv broadcasting, MRI, cell phones, and heart rate montior
Microwaves
Wavelengths from 1mm to 1m, GPS, Bluetooth, radar, Microwave oven
Infrared Radiation
Wavelengths between Microwave and Visble light, Remote controls and night vision googles
Visible light
Only type of EM wave that are seen to humans, White light, used by optic organs of
most animals to see
Ultraviolet light
Harmful to living things, situated beyond the visible spectrum at its violet end —used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays, security images, black light, and sterilize medical equipment (SME)
X-rays
Tiny wavelength and high energy waves, medical imaging and airport security
Gamma rays
Shortest wavelength and has the highest energy, cancer cell treatement, (SME)
Spectroscopy
the study of the properties of light that depend wavelength
When is a spectrum produced?
A spectrum is produced when white light passes through a prism
Continous spectrum
Produced by an incandescent solid, liquid, or
compressed gas, uninterrupted band of color
(dark lines) Absorption Spectrum
Produced when white light is passed through a
comparatively cool, low pressure gas, appears as a continuous spectrum but with dark
lines running through it
(bright lines) Emission Spectrum
Produced when white light is passed through a
comparatively hot, incandescent gas, appears dark but with individual bright lines
running through it
Doppler effect
The apparent change in wavelength of
radiation caused by the relative motions of
the source and observer
Blueshift
light where spectral lines are shifted to
the blue end of the spectrum (moving closer to an object/planet)
Redshift
light where spectral lines are shifted to
the red end of the spectrum (moving further away from an object)
Cataracts
a clouding of the lens of the eye or of its surrounding transparent membrane that obstructs the passage of light
What is Refraction?
When a wave crosses the boundary between two media at an angle , the decreased wavelength causes light to bend.
Prism
A transparent optical device that can refract light
Dispersion
The ability to sperate white light and into a spectrum
Visible spectrum
The colors or when white light is separated
What did Herschel discover in his experiment?
Herschel discovered that the greatest heating occurred in the infrared portion of the Sun’s spectrum.
What is an example of a logitudinal wave?
A sound wave is example.
