General Knowledge :: Physics
- The bats can fly in the dark because
- The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as
- In mirrors the back surface is coated with a thin layer of :
- A light ray travelling from denser to rarer medium at an angle of incidence more than critical angle of concerned media pair suffers.
- The snow on the mountains does not melt all at once when it is heated by the sun because:
- Cloudy nights are warmer compared to clear cloudless nights, because clouds mainly
- In which one of the following the phenomenon of total internal reflection of light is used ?
- Which type of mirror is used in the head lights of vehicles ?
- If objects appear enlarged and inverted in a rear view mirror, then which type of mirror is used?
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