light-reflectionand reractions

Dear Rajani,

You may make a homemade telescope or microscope.
Main things to keep in mind is to understand the concepts particularly and not cramming them. The concepts for eg. keeping in mind the direction of rays etc are crucial and requires a clear understanding. It is a very important unit with very high weitage. NCERT class 10th book is itself a good reference for it, nevertheless you may watch our videos on our website which provides a clear understanding of all the concepts.

Hope this helps.
TopperLearning.com