Class 11 Exam > Class 11 Questions > A convex mirror of focal length f and a conve...
Start Learning for Free
A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain?
Most Upvoted Answer
A convex mirror of focal length f and a convex lens of focal length f/...
Solution:
Given,
focal length of convex mirror f
focal length of convex lens f/2
Distance between mirror and lens 2f
We need to find the distance of the object from the lens.
Let the distance of the object from the lens be x.
Using the mirror formula,
1/f = 1/v + 1/u
where,
v = distance of the image from the mirror
u = distance of the object from the mirror
For a convex mirror, the image is always virtual and formed behind the mirror.
So,
v = -u
Substituting this in the mirror formula, we get
1/f = -1/u - 1/u
1/f = -2/u
u = -f/2
Now, using the lens formula,
1/f = 1/v - 1/u
where,
v = distance of the image from the lens
For a convex lens, the image is formed on the opposite side of the object and is real when the object is placed beyond the focus.
So,
v = 2f
Substituting the given values, we get
1/f = 1/2f - 1/x + 2/f
1/x = 1/2f - 1/3f
1/x = 1/6f
x = 6f
Therefore, the distance of the object from the lens is 6f.
Hence, the correct option is (B) 5f/8.
Given,
focal length of convex mirror f
focal length of convex lens f/2
Distance between mirror and lens 2f
We need to find the distance of the object from the lens.
Let the distance of the object from the lens be x.
Using the mirror formula,
1/f = 1/v + 1/u
where,
v = distance of the image from the mirror
u = distance of the object from the mirror
For a convex mirror, the image is always virtual and formed behind the mirror.
So,
v = -u
Substituting this in the mirror formula, we get
1/f = -1/u - 1/u
1/f = -2/u
u = -f/2
Now, using the lens formula,
1/f = 1/v - 1/u
where,
v = distance of the image from the lens
For a convex lens, the image is formed on the opposite side of the object and is real when the object is placed beyond the focus.
So,
v = 2f
Substituting the given values, we get
1/f = 1/2f - 1/x + 2/f
1/x = 1/2f - 1/3f
1/x = 1/6f
x = 6f
Therefore, the distance of the object from the lens is 6f.
Hence, the correct option is (B) 5f/8.
Community Answer
A convex mirror of focal length f and a convex lens of focal length f/...
A
Attention Class 11 Students!
To make sure you are not studying endlessly, EduRev has designed Class 11 study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Class 11.
|
Explore Courses for Class 11 exam
|
|
Top Courses for Class 11View all
A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain?
Question Description
A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain?.
A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain? for Class 11 2024 is part of Class 11 preparation. The Question and answers have been prepared according to the Class 11 exam syllabus. Information about A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain? covers all topics & solutions for Class 11 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain?.
Solutions for A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain? in English & in Hindi are available as part of our courses for Class 11.
Download more important topics, notes, lectures and mock test series for Class 11 Exam by signing up for free.
Here you can find the meaning of A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain? defined & explained in the simplest way possible. Besides giving the explanation of
A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain?, a detailed solution for A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain? has been provided alongside types of A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain? theory, EduRev gives you an
ample number of questions to practice A convex mirror of focal length f and a convex lens of focal length f/2 are placed at a distance 2f apart. The final image is formed at the middle of lens and mirror. Find the distance of object from lens ? A. f/2 B. 5f/8 C. 3f/8 D. 7f/8 Answer is B. Please explain? tests, examples and also practice Class 11 tests.
|
|
Explore Courses for Class 11 exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup