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.
Official answer
The image formed by the lens is virtual, erect, diminished, and is formed between the object and the lens.
Marking scheme
- 1.nature of image
- 2.position of image
- 3.size of image
- 4.orientation 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.
Common mistakes
- 1.assuming the image is real
- 2.assuming the image is inverted
- 3.assuming the image is enlarged
Analysis and 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.
Interesting facts
Convex lenses are used in magnifying glasses and microscopes to produce enlarged images.
Question details
Q4 of 36 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2017
- Section
- Section A
- Marks
- 2
- Type
- Short Answer
- Chapter
- Light — Reflection and Refraction
Spotted a mistake or something unclear?
Tell us and we will fix it.
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.