Question

1. What is meant by scattering of light? Why does the clear sky appears blue?
2. State joules law or heating
u) An electric iron has a ritme 00.220V
Calculate a) current continued
b) its resistan
25
23. (a) Explain the term Catenation property shown by carbon compound
(b) Draw the electron dot structure of Methane molecule (depict all the valence electrons)
OR
(a) Explain the term "Homolgous series of carbon compound with an example
(b) Draw the electron dot structure of Ethane molecule depict all the valence electrons)
24. (a) Show th
e electron dot structure of the formation of Magnesium fluoride from Magnesium
fluoride ions (depict the movement of electrons clearly)
(b) Why do ionic compounds conducts electricity in molten state whereas, not conducts
electricity in the fused state?
ed for life?​

Answer 1

Answer:

Scattering is the phenomenon in which light ray is redirected in different directions on passing through particles of dimensions comparable to the wavelength of the light.

Due to atmospheric scattering, blue light is scattered the most while red light is scattered the least.

During day, red light is not scattered as the light travels lesser distance and scattering of blue light by the atmosphere makes it appear blue.

During sunrise/sunset, when the Sun is near the horizon, sunlight has to travel a larger distance and blue light is scattered away. Since the red light is scattered less, it can travel longer distances and hence, sun appears reddish during sunrise/sunset.