Define magnifying power of an optical instrument in term of visual angles. Write the condition when visual angle in maximum for naked eye. Write two possible values for magnification of simple microscope.
Important Questions on Optical Instruments
Draw ray diagram for astronomical telescope in normal adjustment and write its magnifying power and length.
Draw ray diagram of compound microscope. Write its magnifying power in normal adjustment. If objective and eye-piece are interchanged, will it behave like a telescope? Explain.
Draw labelled ray diagram of reflecting telescope, write its magnifying power and write its advantages over refracting telescope.
A simple microscope or a magnifying glass with a focal length forms an image at the near point of the eye. Find its magnification.
A man whose least distance of distinct vision is , uses a convex lens of focal length as a magnifying glass. What magnifying power does he obtain?
A person having normal near point () reads a book through a magnifying glass of focal length . What are the nearest and farthest distances at which he can put the book before him? What are the maximum and the minimum angular magnifications (magnifying powers) possible with this simple microscope?
