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What is the difference between a lens and a mirror?
A mirror is a reflective surface. Light passes by the glass and hits the silver backing, reflecting off of it. (The angle of reflection equals the angle of incidence.)
A lens, on the other hand, does not reflect light; it refracts it. After entering the glass, light refracts in a different way depending on the shape of the lens and also makes a focal point where the refracting light comes to a point. This varies for different lenses -- convex or concave -- which is why there are dissimilar lenses for different types of eyeglasses.
1]What is the difference between a photon and a neutron? 2]Why are they massless?
Ohm's law : The electric current (i) in a conductor is proportional to the potential difference (V) between its ends of a constant temperature (T). Verification: To v
ways and rules of finding moment of force
(a) A cast steel ring has a cross-sectional area of 600mm 2 and a radius of 25mm. Verify the mmf essential to establish a flux of 0.8mWb in the ring. Use the B-H curve for cast st
Q. Why the centre of Newton's rings pattern appears dark? The thickness of the air film becomes zero at the point of contact of lens L with glass plate P. Therefore there is no
A record player's needle is 6.5 cm from the center of a 45-rpm record. Calculate velocity of the needle?
In a certain binary-star system, each star has the same mass which is 9.4 times of that of the Sun, and they revolve about their center of mass. The distance between them is the 3.
An electric motor is a device which converts electrical energy into mechanical energy. Principle of electric motor : An electric motor essentially consists of a rectangular co
Q. Illustrate that water drain counter clockwise in the northern hemisphere and clockwise in the southern hemisphere? Answer:- This isn't a myth. It drains counter clockwi
How can you measure wavelength in centimeters using a ruler?
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