Find the power of a convex lens if the image formed is at a distance of 20 cm from the lens when the object is placed on the other side of the lens at 25 cm from the optical centre?
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_________________ is a measure of the moisture in air.
Addition of suitable impurities into semiconductor, is called
While releasing the arrow from a stretched bow, the PE of the bow is converted into?
Which one of the following is not a property of electromagnetic waves?
What is the fundamental unit of amount of a substance?
The instrument used to determine the rotation speed of a shaft is called
While watching 3D movies at the theater, we have to wear special glasses because?
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