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Question

A ray of light passing through principal focus of a convex lens after refraction will emerge

The correct answer is

Parallel to the principal axis

A ray of light travelling parallel to the principal axis of the lens, after refraction through the lens, passes through the principal focus (F_2 or F') on the other side of the lens. Therefore, the correct path for a ray of light passing through the principal focus of a convex lens after refraction is that it will emerge parallel to the principal axis .

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Important Questions from Optics

  1. Who was the first one to use a glass prism to obtain the spectrum of sunlight?

  2. Twinkling of stars is due to:

  3. In which a convex mirror is used?

    A. Rear View mirrors in vehicles

    B. Glass windows

    C. Makeup Mirror

    D. Kaleidoscope

  4. What is the reason for formation of Mirage in desert?

  5. An object is placed 10 cm in front of a lens. The image formed is real, inverted and of same size as the object. What is the focal length and nature of the lens?

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