PPSC Past Paper Service Center Official in Punjab Land Record Authority 2018 Solved MCQs, Everyday Science MCQs, PPSC Solved Past Papers MCQsLight Travel in Vacuum at the speed of?A. 14600 Miles Per Second B. 176000 Miles Per Second C. 186282 Miles Per Second D. 19600 Miles Per Second Which of the following visible colour has the longest wavelength?Night blindness is caused by the lack of which vitamin?
