General Knowledge :: Physics
- Light Emitting Diodes (LED) is used in fancy electronic devices such as toys emit
- Out of the following pairs, which one does not have identical dimension?
- Mercury is commonly used as a thermometric fluid rather than water because
- Optical fibre works on the
- Light from the star, Alpha Centauri, which is nearest to the earth after the sun, reaches the earth in
- Supersonic plane fly with the speed
- On a stationary sail boat, air is blown from a fan attached to the boat. The boat
- Rainbow is due to
- Stars which appear single to the naked eye but are double when seen through a telescope are
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