Q9
1 markMCQSection A

The laws of reflection hold true for:

Light — Reflection and Refraction
Image Formation by Concave Mirror

Options

(0)plane mirrors only
(1)concave mirrors only
(2)convex mirrors only
(3)all reflecting surfaces
Official Answer

The correct option is D (virtual and erect).

virtual and erectbehind the mirrorbetween P and Fconcave mirror

Marking Scheme

  • 11 mark for selecting the correct option (D).

Hint

Refer to the case where the object is placed between the pole PP and focus FF of a concave mirror.

Quick Oral Answer

When an object is placed within the focus of a concave mirror, the image formed is virtual, erect, and enlarged, located behind the mirror.

Analysis & Explanation

The correct option is D.


  • Why D is correct: According to Table 9.1 in the NCERT text, when the object is placed 'Between PP and FF' (which is within the focus), the position of the image is 'Behind the mirror', its size is 'Enlarged', and its nature is 'Virtual and erect'.
  • Why A, B, and C are incorrect: Real and inverted images are formed by a concave mirror only when the object is placed at or beyond the principal focus (FF). When the object is within the focus (between PP and FF), the reflected rays diverge and appear to meet behind the mirror, forming a virtual and erect image, not a real or inverted one.

Common Mistakes

  1. 1Students often assume that concave mirrors only form real and inverted images, forgetting the special case when the object is placed very close to the mirror (between PP and FF).

Interesting Facts

This specific property of forming an erect and enlarged image when the object is close is why concave mirrors are used as shaving mirrors and by dentists to see larger images of teeth.

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2020?

This question carries 1 mark in the CBSE Class 10 Science 2020 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Light — Reflection and Refraction" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Image Formation by Concave Mirror" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2020 paper?

This is a MCQ question from Section A in the CBSE Class 10 Science 2020 paper.