Question

4.
In which of the following ways can a non-luminous body be converted into a luminous bod
a) Rubbing the body with a silk cloth
b) Magnetizing the body by means of an electromagnet
c) Heating the body to a very high temperature
d) Setting the body to a high velocity
Which of the following is not a characteristic of a shadow?
5.​

Answer 1

Answer:

c will be the right ans by heating to a large extent