00:01
Hello students, in this question we need to find image distance.
00:04
At first, one convex lens is placed.
00:09
Given focal length and object distance of that lens.
00:13
Now we need to find image distance.
00:15
For image distance, the formula will become 1 by f minus 1 by u.
00:21
Now focal length given is minus 10 cm.
00:26
Image distance is 20 cm.
00:28
From this, the value of v, image distance will become 20 by 3.
00:37
Next they had given that if a convex lens of focal length 15 cm is attached along with this at the distance of 12 cm, then what will be the final image distance.
00:52
In order to find focal length of that lens, again use the same formula.
00:58
At this, the focal length is given that is 15 cm and the object distance is, the lens is placed 12 cm away from the first lens.
01:14
The first lens object is placed 20 cm.
01:17
If 12 cm away from that lens, the object will become 8 cm to the another lens...