A) blue
B) green
C) violet
D) red
Correct Answer: D
Solution :
Option [d] is correct |
Explanation: As we know that the velocity of wave is: \[v=\operatorname{v}\lambda \] |
When light ray goes from one medium to other medium, the frequency of light remains unchanged. |
So, \[v\propto \lambda \] or greater the wavelength, greater the speed. |
And, the light of red color is of highest wavelength and therefore of highest speed. So, I after travelling through the slab, the red color emerges first. |
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