Question

Diamond ring is a phenomenon observed:
(a) At the start of a total solar eclipse
(b) At the end of the total solar eclipse
(c) Only along the peripheral regions of the totality trail
(d) Only in the central regions of totality trail

Answer 1

Hint: It is observed during solar eclipse when the moon goes by the sun. It appears as a shining diamond set in a bright ring.

Complete answer:
 Diamond ring effect occurs at the beginning and end of a solar eclipse. When the moon overlaps the sun rays completely, a bright shine can be sun which appears as a diamond. This effect is due to the topography of the moon. The light rays of sun shine through some places and not others.
The periphery of the moon is surrounded by the sunlight which acts as a ring and the last bead is left which acts as diamond. This diamond ring is witnessed during the solar eclipse only along the peripheral regions of the totality trail.

Hence, option (c) only along the peripheral region of the totality is correct.

Additional information:
It is also known as Baily’s beads effect. It is named after Francis Baily who explained the phenomenon $1836$.

Note:
Diamond ring effect is a beautiful effect to be witnessed but we cannot observe it with our naked eyes. It has harmful rays which may cause severe damage to our eyes.