One day, Mike’s friend was performing their respective experiments
given by their teacher. While sitting in the practical lab instead of performing
experiment, Mike was playing with his meter scale. All the sudden, he held
the scale in his hand and started moving in front of tube-light, then he observed the seven colours of white light.
(a) What is the band of seven colours called?
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One day, Mike’s friend was performing their respective experiments
given by their teacher. While s...
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