A lemon kept in water in a glass tumbler appears to be bigger than its actual size when viewed from the sides. This is because of
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When a ray of light travels from a denser medium to a rarer medium, it bends
The absolute refractive index of air is
Which of the following physical quantity measures the rate of work done?
Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?
What is the fundamental unit of amount of a substance?
The instrument used for measuring air pressure is called .....
Meter in a vehicle that calculates distance covered by the vehicle is called __________.
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