Question

which of the following quantity is not changed during refraction of light
${.y.04242.50 { | {22x}^{?} | }^{?} }^{?}$
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Answer 1

Answer:

what is your mean

i don't know the answer

please make me as brilliant and like me please

because I am in class 9th

Answer 2

Answer:

you are Search on Google

please make me brilliant and like me please