Which one of the following statements is not correct ?
The longest wavelength of light visible to human eye is about 700 nm
The shortest wavelength of light visible to human eye is about 400 nm
The wavelength of gamma rays is longer than that of X-rays
The ability of a telescope to form separable images of close objects is called its resolving power
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