The diagram given below shows an object O and its image I. Without actually drawing the ray diagram, state the following :
(i) Type of lens (Converging / Diverging)
(ii) Name two optical instruments where such an image is obtained.
(iii) List three characteristics of the image formed if this lens is replaced by a concave mirror of focal length 'f' and an object is placed at a distance 'f/2' in front of the mirror.
The diagram given below shows an object O and its image I. Without actually drawing the ray diagram, state the following :
(i) Type of lens (Converging / Diverging)
(ii) Name two optical instruments where such an image is obtained.
(iii) List three characteristics of the image formed if this lens is replaced by a concave mirror of focal length 'f' and an object is placed at a distance 'f/2' in front of the mirror.
The diagram shows a converging lens. The image formed is real, inverted, and magnified. The optical instruments where such an image is obtained are a microscope and a telescope. If this lens is replaced by a concave mirror of focal length 'f' and an object is placed at a distance 'f/2' in front of the mirror, the image formed will be real, inverted, and magnified.
Marking Scheme
- 1Converging lens
- 2Microscope and telescope
- 3Real, inverted, and magnified
Hint
The diagram shows a converging lens. The image formed is real, inverted, and magnified. The optical instruments where such an image is obtained are a microscope and a telescope. If this lens is replaced by a concave mirror of focal length 'f' and an object is placed at a distance 'f/2' in front of the mirror, the image formed will be real, inverted, and magnified.
Quick Oral Answer
The diagram shows a converging lens. The image formed is real, inverted, and magnified. The optical instruments where such an image is obtained are a microscope and a telescope. If this lens is replaced by a concave mirror of focal length 'f' and an object is placed at a distance 'f/2' in front of the mirror, the image formed will be real, inverted, and magnified.
Analysis & Explanation
The diagram shows a converging lens. The image formed is real, inverted, and magnified. The optical instruments where such an image is obtained are a microscope and a telescope. If this lens is replaced by a concave mirror of focal length 'f' and an object is placed at a distance 'f/2' in front of the mirror, the image formed will be real, inverted, and magnified.
Common Mistakes
- 1Diverging lens
- 2Convex mirror
- 3Virtual, upright, and diminished
Interesting Facts
The diagram shows a converging lens. The image formed is real, inverted, and magnified. The optical instruments where such an image is obtained are a microscope and a telescope. If this lens is replaced by a concave mirror of focal length 'f' and an object is placed at a distance 'f/2' in front of the mirror, the image formed will be real, inverted, and magnified.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2020?
This question carries 3 marks 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 Spherical Mirrors" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2020 paper?
This is a Short Answer question from Section B in the CBSE Class 10 Science 2020 paper.