The mirror reflects the light while the lens allows the light to pass through it. The lens and mirror are positioned parallel and opposite each other.
The basic difference between the lens and mirror is that mirror reflects the light while the lens allows the light to pass through it. Both are optical instruments but their laws are different.
The lens and mirror are positioned parallel and opposite each other. From the above conditions, it is observed that first, the light gets passed through the lens.
After it passes through the light got reflected. As the light reflected the mirror it again passes through the lens and converts the distributed or parallel lights into a single beam of light.
The single beam of light is known as the spotlight.
Such types of design for a spotlight use a lens and a mirror, combined with a gas-discharge lamp, to project a powerful parallel beam of light.
Hence the lens and mirror are positioned parallel and opposite to each other.
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