Qstnid -A-14- The Wavelengths For The Light Of Red And Blue Colours Are Roughly 7.8 X 10<sup>-7</sup> M And 4.8 X 10<sup>-7</sup> M Respectively. (A) Which Colour Has The Greater Speed In Vacuum? (B) Which Colour Has The Greater Speed In Vacuum? - 06: Spectrum Of Light

with Solutions - page 2

#14
The wavelengths for the light of red and blue colours are roughly 7.8 x 10^-7
m and 4.8 x 10^-7
m respectively. (a) Which colour has the greater speed in vacuum? (b) Which colour has the greater speed in vacuum?
Ans : 14 (a) In vacuum, both have the same speeds. (b) In glass, red light has a greater speed.

#14-a
Which colour has the greater speed in vacuum?
Ans : In vacuum, both have the same speeds.

#14-b
Which colour has the greater speed in vacuum?
Ans : In glass, red light has a greater speed.