2 years ago

What is principal focus and focus length with examples

1 answer:

7 0

Explanation:

Principle focus is the point on the axis of a convex lens, where the parallel rays of light from one side of the lens. meet on other side after refraction. Distance between optical centre to principle focus point is the focal length.

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Answer:

Wavelength of electromagnetic wave will be 5.281 m

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What is principal focus and focus length with examples​

What is principal focus and focus length with examples