With the help of a suitable diagram, explain the meaning of terms:
(a) centres of curvature (b) optical centre (c) focus
Answers
Explanation:
a car is being driven by a force of 5 x 10¹⁰ N. When travelling at a speed of 10 m/s it takes 2 minutes for this car to reach the river side. Calculate the work done.
Answer:
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Explanation:
Centre of curvature :
each of the two surfaces of a spherical lens can be regarded as a part of sphere the centre of two spheres known as the centre of curvature of two surfaces of the lens
Optical centre :
the optical centre of a lens is a special point on its principal axis A Ray of light passing through the optical centre of a lens goes straight through it without undergoing any bending or deviation from its path
Focus :
focus is also known as principal focus it turns out that if a beam of rays all parallel to the principal axis of a lens falls on the lens all such rays either all converge to a point on its principal axis or appear to diverge from a point on its principal axis