Question

8. Raman got a watch as his birthday present. After a few days. There is a problem in the
watch. So, his father took the watch to a watch maker and he also accompanied him. He
noticed that the watchmaker placed something on his eye to check the watch. When the
watchmaker was done with his work, out of curiosity he asked the watch maker about that
thing he placed on his eye.
a) What is the thing that the watch maker placed on his eye while fixing the watch.?
b) What should be the focal length of such lens?
c) Why watch maker generally holds watch very close to his eyes while viewing it through the lens?
d) Draw the corresponding ray diagram for the lens when the object is held very close to the lens?
e) What is the common name (another) of the lens used in the above situation?​

Answer 1

Answer:

a) Lens to be used is converging lens

b) Focal length should be more

c) he hopds that close to his eyes to have a distinct view of the virtual image of the object.

e) Another name = convex lens

@phenom