5th lecture: Green house effect

Question 1

What is blackbody?

Answer 1

It absorbs all radiation of all wavelengths falling on its surface.
An ideal radiator, emitting the highest possible amount of radiant energy of all possible bodies of the same temperature.

Question 2

What are 2 kinds of solar radiation?

Answer 2

Straight- straight beams visible with a human eye
Scattered - in the atmosphere

Question 3

Name 3 parts of solar radiation spectrum in increasing order?

Answer 3

Ulraviolet<visible<infrared

Question 4

What is green house effect?

Answer 4

Greenhouse gases, including carbon dioxide (CO2), methane (CH4), water vapor (H2O), nitrous oxide (N2O), and fluorinated gases, absorb and re-emit some of this outgoing infrared radiation.

This process traps heat within the lower atmosphere, warming the planet.

Question 5

What is ALBEDO?

Answer 5

measure of how much solar radiation is reflected by a surface compared to how much it absorbs (0-1) 1-total reflection, no absorbtion
High-albedo surfaces, like snow or ice, reflect a large portion of incoming sunlight.
Low-albedo surfaces, like forests, soil, or oceans, absorb more sunlight and reflect less.
Surfaces with low albedo absorb more heat, contributing to localized warming.

Question 6

• Main gfg responsible for the planet’s total heating are

Answer 6

CO2 , CH4 ,N2O and halogenated hydrocarbons.