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Class 10 Science Medium Mcq English Medium

According to the lens sign convention, the focal length of a convex lens is taken as

Question
According to the lens sign convention, the focal length of a convex lens is taken as
negative
positive
zero
undefined
Answer
positive
Detailed Explanation
The chapter states that, by convention, the focal length of a convex lens is positive.
What makes objects visible to us during the day, according to the chapter? Science · Light – Reflection and Refraction We are able to see through a transparent medium because light is Science · Light – Reflection and Refraction By observing common optical phenomena, we may conclude that light seems to travel in Science · Light – Reflection and Refraction The straight-line path of light is usually indicated as a Science · Light – Reflection and Refraction

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