Objects which are able to emit light are known as------

Objects which emit their own light are called ________ objects.

Materials that allow light to pass through completely are known as ----materials.

The factors which induce mutations are known as _______.

If all object around us were to reflect light in a reguler way,what problem might we face?

Material that are not able to allow light to pass through it are called ------ materials

Materials that allow light to pass through partially are known as ---materials.

Consider the following statements about transparent objects : (i) They allow all the light to pass through them. (ii) Glass, polythene, air, water and butter paper are examples of transparent objects. Which of the following statements is/are correct?

The velocity at which a rocket is able to escape from the ___________ of the Earth is called escape velocity.