Difference between Spectra Vs Spectrum Vs Spectra (Singular Vs Plural)

This is a summary of English word usage.

According to the Cambridge Advanced Learner's Dictionary:

1. Spetral (Adjective)
- specialized of the set of colours into which a beam of light can be separated spectral light

2. Spectrum (Noun)
-the set of colours into which a beam of light can be separated, or a range of waves, such as light waves or radio waves
-The colours of the spectrum - red, orange, yellow, green, blue, indigo and violet - can be seen in a rainbow.

3. Spectra = plural of spectrum


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