Published on Mon Mar 02 13:30:21 UTC 2015
| 59 views
Question - A student focussed the image of a distant object using a device 'X' on a white screen 'S' as shown in the figure. If the distance of the screen from the device is 40 cm, select the correct statement about the device.
A. The device X is a convex lens of focal length 20 cm.
B. The device X is a concave mirror of focal length 40 cm.
C. The device X is a convex mirror of radius of curvature 40 cm.
D. The device X is a convex lens of focal length 40 cm.
Vedantu - Your Personal Teacher Online
- Get an clear edge over other students by constant revision of important topics with an awesome teacher.
- Get your doubts and questions resolved instantly by booking an instant live session
- Prepare for competitive exams with our exam courses and achieve your goal
- Skipped a topic in tuitions? Learn it on Vedantu by taking our topic courses