6. A ray ACB is incident on a spherical mirror whose
centre of curvature is C. In which direction will
it reflect?
7. What is the sign of the object-distance u when an
object is placed before a concave mirror?
8. Where can the position of an object be if a concave
mirror forms its erect and virtual image?
9. A mirror has focal length f = +10 cm. Is it convex
or concave?
10. What are the values of the angle of incidence and the
angle of reflection for normal incidence on a
plane mirror?
plz ans it and don't spam
Answers
Answer:
Any ray which passes through the centre of curvature is incident on a spherical mirror will retrace its path , that is pass again through the centre of curvature . So the ray will go back along the path ACB.
7.What is the sign of object distance (-u) from a convex mirror? As per the new Cartesian system, the sign of the distance of the object from a convex mirror is always negative.
8.Concave mirror forms an erect, virtual and enlarged image of an object. When the object is placed close/near the mirror a virtual image is formed.
9.IT MUST BE CONCAVE. because, distance of real image are positive and distance of virtual image is negative. converging optical elements have positive(f) and diverging optical elements have negative(f).
10.When a ray of light is incident normally on a plane mirror it means that the angle of incidence is 0ₒ. From the law of reflection, we find that angle of reflection is also 0. Thus, for normal incidence on a plane mirror, angle of incidence and angle of reflection are 0ₒ.
I know only No.1:-
A ray of light which passes through the centre of curvature is incident on a spherical mirror. It will retrace its path, that is pass again through the centre of curvature. So the ray will go back along the path ACB.
It came on my maths exam!!!
