The image formed by a spherical mirror is real, inverted and is of magnification . If the image is at a distance of 30 cm from the mirror, where is the object placed? Find the focal length of the mirror. List two characteristics of the image formed if the object is moved 10 cm towards the mirror.
The image formed by a spherical mirror is real, inverted and is of magnification . If the image is at a distance of 30 cm from the mirror, where is the object placed? Find the focal length of the mirror. List two characteristics of the image formed if the object is moved 10 cm towards the mirror.
Official answer
Given that the magnification of the image is -2 and the image is at a distance of 30 cm from the mirror, we can use the mirror formula to find the object distance and focal length of the mirror.
Marking scheme
- 1.Object distance = 15 cm
- 2.Focal length = 10 cm
Hint
Use the mirror formula to find the object distance and focal length of the mirror.
Quick oral answer
The object distance is 15 cm, and the focal length of the mirror is 10 cm.
Common mistakes
- 1.Forgetting to use the mirror formula
- 2.Incorrectly substituting values in the mirror formula
Analysis and explanation
The image formed by a spherical mirror is real, inverted, and is of magnification -2. This means that the image is on the same side as the object and is twice the size of the object. The image distance is given as 30 cm. We can use the mirror formula to find the object distance and focal length of the mirror.
Interesting facts
The mirror formula can be used to find the object distance and focal length of a mirror.
Question details
Q17 of 36 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2016
- Section
- Section A
- Marks
- 3
- Type
- Short Answer
- Chapter
- The Human Eye and the Colourful World
- Topic
- Spherical Mirrors and Lenses
- Bloom's level
- Applying
- Syllabus topic
- Reflection of Light
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2016?
This question carries 3 marks in the CBSE Class 10 Science 2016 examination.
Which chapter does this question come from in Science?
This question is from the chapter "The Human Eye and the Colourful World" in the CBSE Class 10 Science syllabus.
What topic does this question cover in Science?
This question covers the topic "Spherical Mirrors and Lenses" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2016 paper?
This is a Short Answer question from Section A in the CBSE Class 10 Science 2016 paper.