Which layer in the atmosphere helps in sending the radio waves from the earth are reflected back to the earth a mesosphere B exosphere C stratosphere D thermosphere?
Answer: The layer present right above the mesosphere extending to a height of 450 km is the thermosphere. This layer is composed of electrically charged ions that are responsible for reflecting the radio waves back to the Earth’s surface. Due to the presence of these ions, thermosphere is also known as ionosphere.
Which layer of the atmosphere makes radio communication possible?
Which of the following layer of the atmosphere reflects radio waves and helps in radio communication?
What are the layers of the atmosphere?
Earth’s atmosphere has five major and several secondary layers. From lowest to highest, the major layers are the troposphere, stratosphere, mesosphere, thermosphere and exosphere.
What layer do we live on?
Why is the ozone layer bad?
Ozone depletion can cause increased amounts of UV radiation to reach the Earth which can lead to more cases of skin cancer, cataracts, and impaired immune systems. Overexposure to UV is believed to be contributing to the increase in melanoma, the most fatal of all skin cancers.
Which country has the biggest hole in the ozone layer?
Largest-ever Ozone Hole over Antarctica. A NASA instrument has detected an Antarctic ozone “hole” (what scientists call an “ozone depletion area”) that is three times larger than the entire land mass of the United States—the largest such area ever observed.
How large is the ozone hole now?
The 2020 ozone hole grew rapidly from mid-August and peaked at around 24 million square kilometres in early October. It now covers 23 million km2, above average for the last decade and spreading over most of the Antarctic continent.
Why can I smell rain coming?
Most of us have probably smelt that lovely fresh, earthy aroma of an approaching rain storm. Now scientists have discovered why people can smell the storms so far away. A sensitive snout is smelling ozone, petrichor and geosmin; in other words, the nose smells oxygen, the debris that raindrops kick up and wet bacteria.
Can you smell rain coming?
Of course, rain itself has no scent. But moments before a rain event, an “earthy” smell known as petrichor does permeate the air. People call it musky, fresh — generally pleasant. A byproduct of their activity is an organic compound called geosmin, which contributes to the petrichor scent.
What’s the smell of rain called?