Correct answer
A. wave front
Explanation
wave front is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
In multiplication and division of measurement______________?
UV radiation can be produced by______________?
When a force is applied at one end of an elastic wire it produces at strain ∝ in the wire. If y is the youngs modulus of the material of the wire the amount of energy stored per unit volume of the wire is given by_________________?
One light year is equal to________________?
If vectors a and b are antiparallel to each other then their resultant is ___________?
Which one of the following materials is useful for making bulb filaments ?