Science

Which instrument is used for measuring temperature of human body?
Clinical Thermometer

Which instrument is used for measuring radiant heat?
Bolometer

Which instrument is used to compare the intensities of two sources of light?
Photometer

Which instrument is used in Land Surveying for measuring angels horizontally and vertically?
Theodolite

Which instrument is used for check up whether a cell is generating current or not?
Galvanometer

In an ordinary light bulb filament is made of
Tungsten

Who conducted the experiment that produced vacuum for the first time?
Blaise Pascal

Who discovered electricity in lightning?
Benjamin Franklin

The blue colour of the sky is due to
Refraction of light

Which is unit frequency?
Hertz