Bissoy.com
Doctors Medicines MCQs Q&A

Consider the following statements: A ray parallel to the principal axis incident on a concave mirror after reflection passes through the focus. A ray passing through the center of curvature of a concave mirror after reflection is reflected back along the same path. A ray passing through the center of curvature of a concave mirror after reflection passes through the focus. Which of the following statement is INCORRECT?

Consider the following statements: A ray parallel to the principal axis incident on a concave mirror after reflection passes through the focus. A ray passing through the center of curvature of a concave mirror after reflection is reflected back along the same path. A ray passing through the center of curvature of a concave mirror after reflection passes through the focus. Which of the following statement is INCORRECT? Correct Answer Only 3

CONCEPT:

  • Convex mirror: If the outer surface of the spherical mirror is the reflecting surface then it is called a convex mirror. It is also called the diverging mirror.
    • The nature of the image formed by a convex mirror does not depend on the distance of the object from the mirror. These images are always virtual, smaller than the object, and situated behind the mirror.
  • Concave mirror: If the inner surface of the spherical mirror is the reflecting surface, then it is called a concave mirror. It is also called a focusing mirror/converging mirror.
    • The size of the image produced by these mirrors can be larger or smaller than the object, depending upon the distance of the object from the mirror.
    • The concave mirror can form both real as well as virtual images of any object.

EXPLANATION:

  • A ray parallel to the principal axis incident on a concave mirror after reflection passes through the focus(F) of the mirror. Therefore statement 1 is correct.

Additional Information

  • Formation of images for different positions of the object by a concave mirror:

[ alt="F1 J.K 8.5.20 Pallavi D8" src="//storage.googleapis.com/tb-img/production/20/05/F1_J.K_8.5.20_Pallavi_D8.PNG" style="width: 535px; height: 308px;">

Related Questions

A ray of light travels from air to water as shown below. What are ray PQ and ray PR?   Ray PQ Ray PR (A) Reflected ray Refracted ray (B) Reflected ray Reflected ray (C) Refracted ray Refracted ray (D) Refracted ray Reflected ray
Consider the following statement: A ray of light passing through the optical centre of a convex lens emerges without any deviation after refraction. A ray of light passing through the first principal focus of a convex lens  emerges parallel to the principal axis after refraction. A ray of light passing through the optical centre of a convex lens emerges parallel to the principal axis after refraction. Which one of the following statements INCORRECT?
The angle between the incident ray and the ray reflected from a plane mirror is 60°. Through what angle is the reflected ray deviated with respect to the incident ray?
If a ray incident on the concave mirror passes through the center of the curvature, what happens to the reflected ray?
Which of the following statements are true? (i) The principal focus of a converging lens is real. (ii) The principal focus of a diverging lens is virtual. (iii) The principal focus of a lens is always along the principal axis.
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. $$I$$P) is given by (where, A = Area of the section, $$I$$G = Moment of inertia of the section about an axis passing through its C.G. and h = Distance between C.G. and the parallel axis.)
According to parallel axis theorem, the moment of inertia of a section about an axis parallel to the axis through center of gravity (i.e. $${I_{\text{P}}}$$) is given by (where, A = Area of the section, $${I_{\text{G}}}$$ = Moment of inertia of the section about an axis passing through its C.G. and h = Distance between C.G. and the parallel axis.)
Given below are four statements- (p) The second principal focus of a lens is the position of the object, real or virtual whose image is at infinity. (q) The second principal focus of a lens is the position of the image, real or virtual whose object is at infinity. (r) The first principal focus of a lens is the position of the object, real or virtual whose image is at infinity. (s) The first principal focus of a lens is the position of the image, real or virtual whose object is at infinity.  Examine the above statements and find which among then are correct. 
An incident ray strikes a plane mirror at an angle of 20 deg with the mirror. The angle between the incident ray and reflected ray is ____.
A ray that is incident through the centre of curvature for concave mirror, is reflected back: