An object is placed at a distance of 15 cm from a convex lens of focal length 20 cm. List four characteristics (nature, position, etc.) of the image formed by the lens.
An object is placed at a distance of 15 cm from a convex lens of focal length 20 cm. List four characteristics (nature, position, etc.) of the image formed by the lens.
The image formed by the lens is virtual, erect, diminished, and is formed between the object and the lens.
Marking Scheme
- 1nature of image
- 2position of image
- 3size of image
- 4orientation of image
Hint
Use the lens equation to determine the image distance and then use the magnification equation to determine the size of the image.
Quick Oral Answer
The image formed by the lens is virtual, erect, and diminished, and is formed between the object and the lens.
Analysis & Explanation
The characteristics of the image formed by a convex lens depend on the position of the object relative to the focal point. When the object is placed between the focal point and the lens, the image is virtual, erect, and diminished.
Common Mistakes
- 1assuming the image is real
- 2assuming the image is inverted
- 3assuming the image is enlarged
Interesting Facts
Convex lenses are used in magnifying glasses and microscopes to produce enlarged images.
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Frequently Asked Questions
How many marks does this question carry in CBSE Class 10 Science 2017?
This question carries 2 marks in the CBSE Class 10 Science 2017 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 type of question is this in the CBSE Class 10 Science 2017 paper?
This is a Short Answer question from Section A in the CBSE Class 10 Science 2017 paper.