What do you mean by a focal point?

एका वाक्यात उत्तर

A focal point is a principal focus of the mirror where a parallel beam of light meets(or appears to meet) after reflection from the mirror.

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Images Formed by a Plane Mirrors

या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?

पाठ 6: Light - Spherical Mirrors [पृष्ठ २५८]

पाठ 6 Light
Spherical Mirrors | Q 4 | पृष्ठ २५८

Fill in the blank

A ________ image cannot be obtained on a screen.

Select the correct alternative

The angle between the incident ray and the ray reflected from the plane mirror is 70°. The angle of incidence will be :

How many images are formed for a point object kept in between two plane mirrors at right angles to each other? Show them by drawing a ray diagram.

State two uses of a plane mirror.

Explain the following term:

Normal Draw

diagram/diagrams to show them.

Prove geometrically that when plane mirror turns through a certain angle, the reflected ray turns through twice the angle.

Draw a neat two ray diagram for the formation of images in two plane mirrors, when mirrors are at facing each other.

Select the correct option:

A ray of light is incident on a concave mirror. If it is parallel to principal axis, the reflected ray will: