ICSE Class 10 Physics 2020 Solved Paper

The wave length for the light of red and blue colours are nearly $7.8 × 10^{-7} {\m}$ and $4.8 × 10^{-7}$ $m$ respectively.

Question : 15 of 67

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Which colour has the greater speed in a vaccum?

Solution:

Both red and blue colours have equal speed in a vacuum.

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