1. A person can swim comfortable in water. This is due to: Newton’s third law

2. A type of stone that can float on water: Pumice stone

3. An idealized physical body that absorbs all incident
electromagnetic radiation, regardless of frequency
or angle of incidence: Black body

4. Brilliance of diamond is due to: Total internal refection

5. Colour of a star depends upon its: Temperature

6. Endoscopy, a technique used to explore the
stomoach or other inner parts of the body, is based
on the principle of: Total Internal Reflection

7. GSM stands for: Global System of Mobile Communications

8. How many carats is pure gold? 24 carats

9. Hydrogen bomb is based on the principle of: Uncontrolled fusion reaction

10. Hydrogen spectrum was first explained by: Niels Bohr