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Spherical Mirror

For a concave...

Question

For a concave mirror, the principal focus is ..................... the reflecting surface.

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Solution

For a concave mirror, the principal focus is in front of the reflecting surface.

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Q. For concave mirror, the reflected ray travels parallel to principal axis if the incident ray passes through focus

An incident ray which passes through the principal focus, after reflection on a concave mirror, emerges.....................

A ray starting from the focus of a concave mirror becomes parallel to the principal axis after reflection.

Q. State whether the following statements are true or false. Rewrite the false statements correctly.
(a) The laws of reflection hold good only for plane mirrors and not for spherical mirrors.
(b) The radius of curvature is double the focal length of a concave mirror.
(c) A ray passing through the focus cuts through the principal axis of a concave mirror after reflection.
(d) When an object is placed between a concave mirror and its focus, the image formed is virtual, erect and larger than the object.
(e) The image formed on a cinema screen is virtual.
(f) A convex mirror is used by stage artists.
(g) A convex mirror always gives real images.
(h) A pinhole camera gives a real image.
(i) A convex surface bulges inwards.
(j) Incident rays parallel to the principal axis of a curved mirror pass through the focus after reflection.
(k) A concave mirror always forms a real image.
(l) There can be many reflected rays for a single incident ray falling on a reflecting surface.

If the incident ray passes through focus, then the reflected ray is ______ to principal axis in concave mirror.

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