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Q4. How are the colours of a spectrum arranged? In order of increasing frequency In order of decreasing frequency In the order of increasing wavelength In random order    
Asked by sonalnr | 21 Nov, 2019, 09:47: PM
answered-by-expert Expert Answer
when we refer spectrum of light, we see the arrangement VIBGYOR , i.e., Violet, Indigo, Blue, Green, Yellow, Orange and Rd.
This arrangement is in the order of increasing wavelength
Typical wave length of each color
 
Violet  :-  400 nm ,
Indigo :- 450 nm ,
Blue :-    475 nm,
Green :- 550 nm ,
Yellow :- 580 nm ,
Orange :- 600 nm ,
Red :-      700 nm
Answered by Thiyagarajan K | 22 Nov, 2019, 09:19: AM

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