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What do you mean by resolving power of an optical instrument ? How does resolving power of a telescope depend on wavelength of light and diameter of objective lens ? |
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Answer» Solution :The ability of an instrument to separate or distinguish close ADJACENT images is CALLED the resolving power of that OPTICAL instrument . Resolving power and resolving limit are reciprocal. If wavelength of LIGHT is `lambda` and diameter of objective is d, then resolving limit of atelescope , `theta =(1.22lambda)/(d)` `therefore` Resolving Power `=1/(theta)=d/(1.22 lambda)` Hence , if wavelength of light decreases then resolving power oftelescope INCREASES and if diameter of objective lens is increased then the resolving power of telescope will also increase. |
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