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Physics
Multiple Choice Question with Two or More Choices Correct Huygen' s principle of secondary wavelets can be used to (a) deduce the laws of reflection of light (b) deduce the laws of refraction of light (c) explain the transverse nature of light waves (d) predict the location of a wavefront as time passes
Chemistry
Fill in the Blank : The pH of pure water is temperature ................ .
Mathematics
If log₃2, log₃(2^x- 5) and log₃(2^x - 7/2) are in arithmetic progression, determine the value of x.