books انزياح خطوط الطيف
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# spectrum lines
# opposite lines of the spectrum
# What are the colors of the spectrum?
# What are the colors of the visible spectrum?
# How many colors are there in the spectrum?
# air spectrum lines
# emission lines spectrum
# dark lines spectrum
# Hydrogen Spectrum Lines
# The spectrum of bright lines
# linear spectrum of a gas
# blue shift
# car body shift
# chemical shift
# Lamb shift
# The principle of equilibrium shift
# doubling shift
# low temperature shift
# high temperature shift
# phase shift
