Which of these colours in the visible spectrum has the longest wavelength?

a

Red

b

Blue

c

Yellow

d

Violet

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Explanation

Correct Option
a

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Discussions (4)

Raphaelle
3 months ago

Explanation
Longest Wavelength: Red light has the longest wavelength in the visible spectrum, ranging from approximately 625 to 740 nanometers (nm).

Energy and Frequency: Because wavelength is inversely proportional to frequency and energy, red light has the lowest frequency and the lowest energy among the visible colors.

Order of Spectrum: The visible spectrum is often remembered by the acronym ROYGBIV (Red, Orange, Yellow, Green, Blue, Indigo, Violet), which lists colors from longest to shortest wavelength.
Why other options are incorrect
❌ B. Blue: Blue light has a much shorter wavelength than red, typically between 435 and 500 nm.

❌ C. Yellow: Yellow light falls in the middle of the spectrum with a wavelength of approximately 570 to 590 nm, which is shorter than red but longer than blue.

❌ D. Violet: Violet has the shortest wavelength in the entire visible spectrum, measuring approximately 380 to 450 nm.

Sensei
2 months ago

Sup guys am David Godfrey I just finished writing my exams I usually use this app and am almost in every year and questions just finish writing my exam on the 17th I know I have done my best, thank you lord and thank you my school and also Mr Frank God will bless you all am checking my results tmr morning hope I pass cause I have studied hard alot and denied my self from a lot of fun and had sleepless night I hope God crowns my effort am checkking my results tmr I hope I pass cause i have tried my best

PEACE ✌️

testy21
2 months ago

rainbow guys.. rainbow

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