A ray of light travels obliquely from a less dense medium to a denser medium. Which of the following statements is true about the light?
 

An electron of mass 9.1x 10\(^{31}\) kg is travelling at a speed of 2.0 x 10\(^6\)ms\(^{-1}\). Calculate the associate wavelength of the electron. [h = 6.6. x 10\(^{34}\) Js]

Which of the following statements about the process of melting of a solid are true? The temperature of the solid will 

I. remain steady until melting starts.

ll. keep rising until melting starts,

Ill remain steady as melting proceeds. 

V, keep rising as melting proceeds.

A diver steps off a diving platform that is 10m above the water. If there is no air resistance during the fall, there will be a decrease in the diver's

 Which of the following actions would increase the electric force between two positively charged particles?