Physics
For an incident ray directed towards center of curvature of a spherical mirror, the reflected ray:
- retraces it's path
- passes through the focus
- passes through the pole
- becomes parallel to the principal axis
Answer
retraces it's path
Reason — A line joining the centre of curvature to any point on the surface of mirror is normal to the mirror at that point, so a ray AD passing through the center of curvature C (or appearing to pass through through the centre of curvature C) is incident normally on the spherical mirror.
Since it's angle of incidence is zero, therefore the angle of reflection will also be zero and the ray AD gets reflected along it's own path DA as shown below.
Related Questions
A ray either incident from the focus (or converging at the focus), after reflection from a spherical mirror :
- becomes perpendicular to the principal axis
- becomes parallel to the principal axis
- becomes normal to the focus
- passes through the centre of curvature
A concave mirror has a …………… focus, whereas a convex mirror has a …………… focus.
- real and virtual, real
- real, virtual
- virtual, real
- virtual, real and virtual
A focal plane passes through the focus and is …………… to the principal axis.
- parallel
- inclined
- normal
- none of the above
For a concave mirror, when the object is at infinity, the nature of the image formed at focus is
- virtual, inverted
- virtual, diminished to a point
- real, enlarged, inverted
- real, inverted, diminished to a point