# Problem: Two light bulbs are 1.0m apart. From what distance can these light bulbs be marginally resolved by a small telescope with a 5.0cm -diameter objective lens? Assume that the lens is limited only by diffraction and λ = 600nm

###### FREE Expert Solution

The resolving distance, x, is given by:

$\overline{){\mathbf{x}}{\mathbf{=}}{\mathbf{1}}{\mathbf{.}}{\mathbf{22}}\frac{\mathbf{\lambda }\mathbf{D}}{\mathbf{d}}}$

Diameter, d = 5.0 cm(1m/100cm) = 0.05 m

Resolving distance, X = 1.0 m

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###### Problem Details

Two light bulbs are 1.0m apart. From what distance can these light bulbs be marginally resolved by a small telescope with a 5.0cm -diameter objective lens?

Assume that the lens is limited only by diffraction and λ = 600nm