Study the following diagram and select the correct statement about the device 'X':
Study the following diagram and select the correct statement about the device 'X':
Options
Official answer
Device 'X' is a concave mirror of focal length 12 cm
Marking scheme
- 1.Understanding the properties of concave mirrors
- 2.Calculating the focal length of the mirror
- 3.Understanding how images are formed by concave mirrors
Hint
The key to solving this question is to recognize the properties of concave mirrors and understand how images are formed by them. The student should also be able to calculate the focal length of the mirror using the given information.
Quick oral answer
The device 'X' is a concave mirror of focal length 12 cm. This can be determined by analyzing the diagram and understanding the properties of concave mirrors. The image formed by the mirror is real and inverted, which is characteristic of a concave mirror. Additionally, the focal length of the mirror can be calculated using the given information, and it is found to be 6 cm. However, since the object is placed at a distance of 12 cm, which is twice the focal length, the image formed will be real and inverted, and its distance from the mirror will also be 12 cm.
Common mistakes
- 1.Confusing concave mirrors with convex mirrors
- 2.Miscalculating the focal length of the mirror
- 3.Not understanding how images are formed by concave mirrors
Analysis and explanation
This question requires the student to analyze the given diagram and understand the properties of concave mirrors. The student needs to recognize that the image formed by the mirror is real and inverted, which is characteristic of a concave mirror. Additionally, the student needs to calculate the focal length of the mirror using the given information and understand how the image is formed at a distance of 12 cm from the mirror.
Interesting facts
Concave mirrors are used in telescopes to magnify distant objects
Concave mirrors can also be used to focus light onto a small area, making them useful for applications such as solar power generation
Question details
Q30 of 36 questions
- Board
- CBSE
- Class
- Class 10
- Subject
- Science
- Year
- 2015
- Section
- Section B
- Marks
- 1
- Type
- MCQ
- Chapter
- Light — Reflection and Refraction
- Topic
- Mirrors and Lenses
- Bloom's level
- Knowledge
- Syllabus topic
- Refraction of Light
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Frequently asked questions
How many marks does this question carry in CBSE Class 10 Science 2015?
This question carries 1 mark in the CBSE Class 10 Science 2015 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 "Mirrors and Lenses" from CBSE Class 10 Science.
What type of question is this in the CBSE Class 10 Science 2015 paper?
This is a MCQ question from Section B in the CBSE Class 10 Science 2015 paper.