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Most of us know Blue Moons as the second full moon of a single calendar month. These happen a lot, too. The "blue moon" reference is applied to the third full moon in a season with four full moons, thus correcting the timing of the last month of a season that would have otherwise been expected too early. This happens every two to three years (seven times in the Metonic cycle of 19 years).
What is the SI unit of Luminous Intensity?
Which of the following Instrument is used to measure rate of fluid, works on Bernoulli’s theorem?
Who among the following is credited with the discovery of X-rays?
The Atom Bomb dropped in Nagasaki is an uncontrolled nuclear fission made up of:
A ray of light from the object parallel to principal axis of a concave lens, after refraction appears to diverge from which point on the same side of th...
A concave lens has a focal length 15 cm. If the object is placed at 30 cm from the lens, what is the image distance?
Which medium cannot propagate sound waves?
Which law is also called the law of inertia?
Why is red colour preferred for danger signal lights?
Danger signals are generally red as red light –
