Ast-105 Exam Review Questions and A+ Level pass rate
solutions; Latest 2025/2026
Wavelength (lambda) - correct answer distance between successive crests.
Frequency (nu) - correct answer number of crests passing a point per time
speed - correct answer wavelength (lambda) x frequency (nu)
wavelength (lambda) - correct answer speed/frequency (nu)
frequency (nu) - correct answer speed/wavelength (lambda)
Spectra - correct answer colors of visible light, long to short (lambda)
Red - Orange - Yellow - Green - Blue - Indigo - Violet
(ROY B. BIV)
spectrum - correct answer a separation of light into its constituent
wavelengths, using a prism or grating
The Electromagnetic (EM)
Spectrum - correct answer radio, microwave, infrared, visible, ultraviolet, x-
ray, gamma ray
Photon - correct answer packet of energy which acts
like a particle
, radio photons - correct answer least energetic
gamma-ray photons - correct answer most energetic
Properties of Photons - correct answer the higher the frequency, the higher
the energy, the longer the wavelength, the lower the energy
Transverse - correct answer oscillation is perpendicular to travel direction
Longitudinal - correct answer oscillation is parallel to travel direction
Two main "windows" of transparency - correct answer Radio and Optical
Red flame - correct answer Faint
Orange flame - correct answer brighter
white flame - correct answer brightest
F - correct answer -460 32 212
C - correct answer -273 0 100
K - correct answer 0 273 373
Black Body - correct answer ideal absorber and emitter of EM radiation. Ex:
heated bar of iron, stellar photosphere
solutions; Latest 2025/2026
Wavelength (lambda) - correct answer distance between successive crests.
Frequency (nu) - correct answer number of crests passing a point per time
speed - correct answer wavelength (lambda) x frequency (nu)
wavelength (lambda) - correct answer speed/frequency (nu)
frequency (nu) - correct answer speed/wavelength (lambda)
Spectra - correct answer colors of visible light, long to short (lambda)
Red - Orange - Yellow - Green - Blue - Indigo - Violet
(ROY B. BIV)
spectrum - correct answer a separation of light into its constituent
wavelengths, using a prism or grating
The Electromagnetic (EM)
Spectrum - correct answer radio, microwave, infrared, visible, ultraviolet, x-
ray, gamma ray
Photon - correct answer packet of energy which acts
like a particle
, radio photons - correct answer least energetic
gamma-ray photons - correct answer most energetic
Properties of Photons - correct answer the higher the frequency, the higher
the energy, the longer the wavelength, the lower the energy
Transverse - correct answer oscillation is perpendicular to travel direction
Longitudinal - correct answer oscillation is parallel to travel direction
Two main "windows" of transparency - correct answer Radio and Optical
Red flame - correct answer Faint
Orange flame - correct answer brighter
white flame - correct answer brightest
F - correct answer -460 32 212
C - correct answer -273 0 100
K - correct answer 0 273 373
Black Body - correct answer ideal absorber and emitter of EM radiation. Ex:
heated bar of iron, stellar photosphere
