Question

What is meant by -
i) Averted Vision ii) Baily’s Beads iii) Barlow Lens

Answer 1

Explanation:

i) Averted vision is a technique for viewing faint objects which uses peripheral vision. It involves not looking directly at the object, but looking a little off to the side, while continuing to concentrate on the object. ... The most effective direction is that which places the object on the nasal side of the vision.

ii) The Baily's beads effect or diamond ring effect is a feature of total and annular solar eclipses

iii) The Barlow lens, named after Peter Barlow, is a diverging lens which, used in series with other optics in an optical system, increases the effective focal length of an optical system as perceived by all components that are after it in the system