To determine the focal length of the concave mirror three students , and focused on a distance building on a screen. They measured the distance as given below: Student : From the mirror to the screen Student : From building to the screen Student : From the building to the mirrorWho measured the focal length correctly?

Option (a) is correct. ● In a concave mirror, the focal length is the distance between the pole and the focus. ● Student measured the focal length correctly. ● Because he measured the length between the concave mirror and the screen. Option (b) is incorrect. ● In option (b), it is given that the focal length measured by the student only is correct. ● Student measures the distance from the building. Option (c) is incorrect. ● In option (c), it is given that the focal length measured by students and is incorrect. ● Focal length is the distance between the screen and the mirror in the concave mirror. ● So, the focal length measured by the student only is correct. ● So, option (c) is incorrect. Option (d) is incorrect. ● In option d, it is given that the focal length measured by students and is correct.● Focal length is the distance between the screen and the mirror in a concave mirror. ● So, the focal length measured by students and is incorrect. ● So, option (d) is incorrect. Hence option (a) Student : From the mirror to the screen is correct.

To determine the focal length of the concave mirror three students , and focused on a distance building on a screen. They measured the distance as given below: Student : From the mirror to the screen Student : From building to the screen Student : From the building to the mirrorWho measured the focal length correctly?

Option (a) is correct. ● In a concave mirror, the focal length is the distance between the pole and the focus. ● Student measured the focal length correctly. ● Because he measured the length between the concave mirror and the screen. Option (b) is incorrect. ● In option (b), it is given that the focal length measured by the student only is correct. ● Student measures the distance from the building. Option (c) is incorrect. ● In option (c), it is given that the focal length measured by students and is incorrect. ● Focal length is the distance between the screen and the mirror in the concave mirror. ● So, the focal length measured by the student only is correct. ● So, option (c) is incorrect. Option (d) is incorrect. ● In option d, it is given that the focal length measured by students and is correct.● Focal length is the distance between the screen and the mirror in a concave mirror. ● So, the focal length measured by students and is incorrect. ● So, option (d) is incorrect. Hence option (a) Student : From the mirror to the screen is correct.

AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

To determine the focal length of the concave mirror three students 𝐴, 𝐵 and 𝐶 focused on a distance building on a screen. They measured the distance as given below:
Student 𝐴: From the mirror to the screen
Student 𝐵: From building to the screen
Student 𝐶: From the building to the mirror
Who measured the focal length correctly?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

Only 𝐴

Only B

𝐴 and 𝐵

𝐵 and C

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

Option (a) is correct.

● In a concave mirror, the focal length is the distance between the pole and the focus.

● Student 𝐴 measured the focal length correctly.

● Because he measured the length between the concave mirror and the screen.

Option (b) is incorrect.

● In option (b), it is given that the focal length measured by the student 𝐵 only is correct.

● Student 𝐵 measures the distance from the building.

Option (c) is incorrect.

● In option (c), it is given that the focal length measured by students 𝐴 and 𝐵 is incorrect.

● Focal length is the distance between the screen and the mirror in the concave mirror. ● So, the focal length measured by the student 𝐴 only is correct.

● So, option (c) is incorrect.

Option (d) is incorrect.

● In option d, it is given that the focal length measured by students 𝐵 and 𝐶 is correct.

● Focal length is the distance between the screen and the mirror in a concave mirror.

● So, the focal length measured by students 𝐵 and 𝐶 is incorrect.

● So, option (d) is incorrect.

Hence option (a) Student 𝐴: From the mirror to the screen is correct.

Watch 3-min video & get full concept clarity