Science Facts Set-4

• Zinc is a greyish white metal. It is used in making alloys such as brass.
• VY Canis Majoris is the largest known star in the universe.
• A photon is a particle with no rest mass but it is a carrier of energy.
• Light has a dual nature. It has the characteristics of both a particle and a wave.
• LASER means Light Amplification by Stimulated Emission of Radiation.

• Nanotechnology is the study of controlling of matter on an atomic or molecular scale (i.e., of the order of 100 nanometres).
• Avogadro constant is the number of atoms (or molecules) present exactly in 12 grams if carbon-12 isotope.
• An electron has the characteristics of both a wave and a particle.
• The average weight of an adult human brain is about 1300-1400 grams.
• The lifespan of an adult mayfly varies from 30 minutes to one day, depending on the type of species.