Name the type of mirror having a focal length of +20 cm. - Physics

Name the type of mirror having a focal length of +20 cm.

One Line Answer

The mirror having +20 cm as its focal length is a convex mirror because the focal length is taken positive only in case of a convex mirror.

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Chapter 6: Light - Exercise [Page 261]

Chapter 6 Light
Exercise | Q 8 | Page 261

Explain the following term related to spherical lenses:- principal focus

Define Radius of curvature of the spherical mirror

Which mirror will you prefer to use as a rear view mirror in a car : plane mirror or convex mirror? Give one reason.

Upto what maximum distance from a concave mirror, the image can be obtained? What will be the location of object for it?

Define the term Aperture.

What is a mirror formula?

A concave mirror can be used to produce a parallel beam of light. Draw a ray to illustrate this.

The radius of curvature of a spherical mirror is 18 cm. What is the focal length of this mirror?

A ray of light is incident towards a plane mirror at an angle of 30° with the mirror surface. What will be the angle of reflection?

Explain why a ray of light passing through the center of curvature of a concave mirror, gets reflected along with the same pattern.