Question

Give reasons.

(a) Space beyond the earth's atmosphere appears dark.

(b) We are able to read while sitting in the shade.

(c) We should not observe the solar eclipse with naked eyes.

Answer 1

(a) When sunlight is scattered by the particles present in the atmosphere, the surrounding gets illuminated and appears bright. In space, there is no atmosphere i.e. no source for scattering the sunlight. Thus, as sunlight is not scattered in different directions in the space, it appears dark.

(b) Light, which is required for seeing and reading, will reach us even when we are sitting under the shade. This light comes to us upon reflecting from various objects around us.

(c) We should not observe solar eclipse with naked eyes because by doing so we might damage our eyesight. We may suffer from permanent vision impairment or serious eye injuries. Thus, we should always use some device such as binoculars while watching the sun during solar eclipse.