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These resources are designed to help you familiarize yourself with the exam format, identify key topics, and practice effectively. Whether you're preparing for the May/June or GCE sessions, our curated materials provide both objective and theory questions to enhance your study sessions.","tags","waec nigeria west africa examination council","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",10,"createdOn",1755991949910,"updatedOn","questionsCount",27220,"courseCount",23,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_420":421,"_110":426},"NSXRNiTSyWtMmpE0k5hyM7QIIyy8xK","q","The refractive index of a material is 1.5. Calculate the critical angle at the glass-air interface","ans",[414],3,"2013","course","physics","exp","Sin C = \\(\\frac{1}{\\eta} = \\frac{1}{1.5} = 0.6667\\)
\n
\nC = sin\\(^{-1}\\) 0.6667
\n
\n= 42°","opts",[422,423,424,425],"19^o","21^o","39^o","42^o",24,"24","initComment","initReply","actionData","errors"]

WAEC - Physics (2013 - No. 24)

Explanation

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