In optical instruments, the lenses are used to form the image by the phenomenon of ...................................

Q. Rahul performs an experiment of image formation with an optical instrument (various mirrors and lenses) and finds that the image formed is a diminished virtual image. What kind of optical instrument did Rahul use?

Q.

The working of optical instruments like camera, microscope, telescope, etc. having glass lenses is based on a phenomenon of light. Identify the phenomenon

Q. Optical instruments like the periscope and kaleidoscope use the property of ________ in order to create the final image or images.

Q. Fill in the blanks.
Name of an optical instrument which is used to see erect image of distant object is _______.

Q. High quality lens system for optical instrument is made by using ..............