The laws of reflection hold true for:
The laws of reflection hold true for:
Options
Official answer
The correct option is D (virtual and erect).
Marking scheme
- 1.1 mark for selecting the correct option (D).
Hint
Refer to the case where the object is placed between the pole and focus 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.
Common mistakes
- 1.Students 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 and ).
Analysis and 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 and ' (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 (). When the object is within the focus (between and ), the reflected rays diverge and appear to meet behind the mirror, forming a virtual and erect image, not a real or inverted one.
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.
Question details
Q9 of 39 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2020
- Section
- Section A
- Marks
- 1
- Type
- MCQ
- Chapter
- Light — Reflection and Refraction
- Topic
- Image Formation by Concave Mirror
- Bloom's level
- Understanding
- Syllabus topic
- Reflection of light by curved surfaces; Images formed by spherical mirrors, centre of curvature, principal axis, principal focus, focal length, mirror formula, magnification.
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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.