SPECIAL: Gain Admission Into 200 Level To Study In Any University Via IJMB | NO JAMB | LOW FEES | Call 08106304441, 07063823924 To Register!
Select Exam Body:
Select Exam Year:
A boy receives the echo of his clap reflected by a nearby hill 0.8s later. If the speed of sound in air is 3.40ms\(^-1\), how far is he from the hill?
The critical angle for light travelling from a transparent medium to air s measured as 340. The refractive index of the medium is