Refraction of Light — Physics STD 10 — Question

Explain briefly what changes take place within the nuclei when beta particles are emitted by a radioactive substance.

State one factor on which the magnitude of a non-contact force depends. How does the magnitude of a non-contact force change along with distance?

Does reflection also take place with the refraction?

Name the device that converts electrical energy into mechanical energy.

State expression for Resistance connected in parallel.

An object is placed in front of a convex lens such that the image formed has the same size as that of the object. Draw a ray diagram to illustrate this.

For which colour of white light the refractive index of a transparent medium the least? Give the reason for your answer.

Why does not the heating coil produce any visible light? in an electric stove.

Name the phenomenon responsible in the following case:
Apparent bending of a stick in water

Sp. heat capacity of copper is 390 J/kg°C. What do you understand by this statement?