Question

25. Which color has the longest wavelength
A Red
B. Orange
C. Blue
D. Violet​

Answer 1

Answer:

Answer is red

Explanation:

As you see a in a rainbow, the longest curve is the red one while the shortest curve is the violet.

So red has the longest wavelength.

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Answer 2

(A) Red has the longest wavelength.

Explanation:

• Among all the visible colours, red colour has the highest wavelength of $650nm$ and it has the frequency of $4.62\;\times10^{14}Hz$.
• Red light have the least number of waves in a second than any other radiation this is because Frequency is inversely proportional to wavelength.
• However, the colour orange and blue has a wavelength of $5nm$ and $6.66nm$ .
• The colour violet has the shortest wavelength of$380nm$ and has the highest frequency of $7.50\times10^{14}Hz$.