Light rays move in straight lines. But through an optical fibre, they can move in any type of zigzag path because
the holes through the fibre are extremely fine.
light rays are absorbed at the entry end and relieved at the exit end of the fibre.
scattering of light occurs inside the fibre.
successive total internal reflections occur as a ray moves through the fibre.
For election to the Lok Sabha, a nomination paper can be filed by
Miscellaneous · Easy
In a month if the seventh day is three days earlier than Saturday,then the nineteenth day of the month will be a
Miscellaneous · Easy
Which among the following events happened earliest ?
Miscellaneous · Easy
An 80-litre solution of alcohol and water has 75% alcohol. How much water (in litres) must be added to bring down the concentration of alcohol to 60%?
Miscellaneous · Easy