Home
Class 7
PHYSICS
After reflecton, a light ray which is in...

After reflecton, a light ray which is incident along the principal axis of a mirror,

A

retraces its path

B

passes through center of curvature

C

makes zero angle with the normal.

D

All the above.

Text Solution

Verified by Experts

The correct Answer is:
D
The light ray which is incident along the principal axis of a mirror falls normally on the mirror, and hence, it retraces its path.

From the figure it is clear that is passes through the centre of curvature.
As the line passing through the centre of curvature is perpendicular to the mirror, the angle made by the light ray with the normal is zero.
Promotional Banner

Topper's Solved these Questions

  • LIGHT

    PEARSON IIT JEE FOUNDATION|Exercise EXAMPLE |4 Videos

  • LIGHT

    PEARSON IIT JEE FOUNDATION|Exercise TEST YOUR CONCEPTS (VERY SHORT ANSWER TYPE QUESTIONS (FILL IN THE BLANKS))|9 Videos

  • LIGHT

    PEARSON IIT JEE FOUNDATION|Exercise TEST 1|15 Videos

  • KINEMATICS

    PEARSON IIT JEE FOUNDATION|Exercise ASSESSMENT TEST (TEST 2 (SELECT THE CORRECT ALTERNATIVE)|15 Videos

  • MACHINES AND TOOLS

    PEARSON IIT JEE FOUNDATION|Exercise CONCEPT APPLICATION (LEVEL 2)|12 Videos

Similar Questions

Explore conceptually related problems

A light ray is incident along the principal axis of a mirror after reflection ______.

Fill in the folowing blank with a suitable word : A ray of light which is parallel to the parincipal axis of a convex mirror, appears to be conming form……..after reflection form the mirror.

Radius of curvature of concave mirror is R and a light ray is incident on it parallel to principal axis at a height h above the principal axis. Calculate distance of the point from pole of mirror where reflected ray intersects with principal axis.

A light ray travelling parallel to the principal axis of a concave mirror strikes the mirror at angle of incidence theta . If radius of curvature is R , then after reflection, the ray meets the principal axis at a distance d from the centre of curvature then d is

Rays parallel to principal axis, incident on the spherical mirror at different heights from principal axis are focused at different points. And due to this reason we cannot define unique focus. This is known as spherical aberration. Angle of incidence theta shown in figure depends on the height of ray above principal axis. Focal length of spherical mirror can be easily written in terms of angle theta shown in figure as follows : f = R- (R)/(2)sec theta Here R is radius of curvature of mirror. The light rays which are very close to principal axis are known as paraxial rays and rays far away from principal axis are called marginal rays. What will be the focal length for ray which is incident at an angle 60^(@) ?