By whom Proton was discovered?

A yellow dust appears on the fingers, whenever we touch the middle of a flower. These tiny yellow grains are one of the most precious substances in nature because they contain the secret of plant life.  What is this dust called?

The rotations per second of a wheel that spins at an accelerating rate are measured by

Optical Fiber works on the principle of

‘Farad’ is the unit of: 

The size of the earth in the sequence of planets:

Who had given the theory of Plate tectonics?

Which of the following is incorrect?