Question

Objects less than $0.2\, �m$ in size cannot be seen under light microscope because

• A. The wave length of visible light is $3900 \,�$ to $7800\, �$
• B. Only two types of lenses are used
• C. Maximum magnifying power of ocular lens is $20\, X$
• D. Maximum magnifying power of objective lens is $100\, X$

Answer 1

Answer: (A)

The wave length of visible light is $3900 \,�$ to $7800\, �$

Answer 2

Because at the wavelength of visible light $(3900\, � \,to\, 7800 \,�)$ objects cannot be resolved that are less than $0.2\,�m.$