Question

Spherical aberration can be minimised by:

• A. Reducing the aperture of the lens
• B. Using specially made meniscus lens
• C. Combination of lenses made of different glasses
• D. All of these

Answer 1

The correct option is D All of these

Spherical aberration is an optical effect observed in an optical device that occurs due to the increased refraction of light rays when they strike a lens or a reflection of light rays when they strike a mirror near its edge, in comparison with those that strike nearer the centre. It signifies a deviation of the device from the norm, i.e., it results in an imperfection of the produced image.