A ray of light after refraction through a lens emerges parallel to the principal axis of the lens. The incident ray either passes through or appears to meet at:

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Solution

A ray of light after refraction through lens emerges parallel to the principal axis of the lens.
The incident ray either passes through or appears to meet at first focus.

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A ray of light after refraction through a convex lens emerges parallel to the principal axis. (a) Draw a ray diagram to show it. (b) The incident ray passes through a point F on the principal axis. Name the point F.

A ray of light, after rerfraction through a concave lens emerges parallel to the principal axis. (a) Draw a ray diagram to show the incident ray when produced meets the principal axis at point F. (b) Name the point F.

A ray of light after refraction through a lens emerges parallel to the principal axis of the lens. The incident ray passes through :

(a) its optical centre

(b) its first focus

(d) the centre of curvature of the first surface.

A ray light incident on a lens parallel to its principal axis, after refraction passes through or appears to come from :

(a) its first focus

(b) its optical centre

(d) the centre of curvation of its second surface.

Q. A ray of light incident on a lens parallel to its principal axis, after refraction passes through or appears to come from

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A ray of light after refraction through a lens emerges parallel to the principal axis of the lens. The incident ray either passes through or appears to meet at:

A ray of light after refraction through lens emerges parallel to the principal axis of the lens. The incident ray either passes through or appears to meet at first focus.

A ray of light after refraction through lens emerges parallel to the principal axis of the lens.
The incident ray either passes through or appears to meet at first focus.