Is the topic "Magnifying glass" in the chapter "lens" of physics present in the syllabus of class 10 icse semester 1?
Answers
Explanation:
Suppose you take a magnifying glass out on a sunny day and you find that it concentrates sunlight to a small spot 8.00 cm away from the lens. What are the focal length and power of the lens?
Suppose you take a magnifying glass out on a sunny day and you find that it concentrates sunlight to a small spot 8.00 cm away from the lens. What are the focal length and power of the lens?Strategy
Suppose you take a magnifying glass out on a sunny day and you find that it concentrates sunlight to a small spot 8.00 cm away from the lens. What are the focal length and power of the lens?StrategyThe situation here is the same as those shown. The Sun is so far away that the Sun’s rays are nearly parallel when they reach Earth.
The magnifying glass is a convex (or converging) lens, focusing the nearly parallel rays of sunlight.
Thus the focal length of the lens is the distance from the lens to the spot, and its power is the inverse of this distance (in m).