Kerala PSC KERALA PSC LDC Examination 2017 Syllabus Published on 28th March :- CLICK HERE 4 More Details || Kerala PSC KERALA PSC Lower Division Clerk (LDC) Examination Dates Published :- CLICK HERE 4 More Details
WELCOME TO KERALA PSC HELPER || GENERAL KNOWLEDGE AND CURRENT AFFAIRS QUESTIONS BANK * Kerala PSC Helper Blog is a private blog developed and maintained by Harikrishnan & Team, with the goal of providing information about Kerala Government Jobs, India Govt Jobs, Army Jobs, SSC, UPSC etc. And Also Include Latest Current Affairs and General Knowledge Questions. All the information available in this blog is free of cost and we have no relation with Kerala PSC or any other Govt Undertakings.

Competitive Examination Notes - 007

Releted Posts With this Label

Competitive Examination Notes  |  Competitive Examination Notes for LDC Competitive Examination Notes for IAS Competitive Examination Notes HSST | Competitive Examination Notes for PSC Exam | Competitive Examination Notes for IPS | Competitive Examination Notes for SSC Exam | Competitive Examination Notes for RRB Exam | Competitive Examination Notes for Download | Competitive Examination Notes Free Download Competitive Examination Notes for U 
 The Sun - 02
At this average distance of 150 million kilometers, light travels from the Sun to Earth in about 8 minutes and 19 seconds. The energy of this sunlight supports almost all life on Earth by photosynthesis, and drives Earth's climate and weather. The enormous effect of the Sun on the Earth has been recognized since prehistoric times, nad the Sun has been regarded by some cultures as a deity. An accurate scientific understanding of the Sun developed slowly, and as recently as the 19th Centuary, prominent scientists had little knowledge of the Sun's physical composition and source of energy. This understanding is still developing.

While the temperature of the Sun drops from 15,000,000 K at the center to 5,800 K at the photosphere, a surprising reversal occurs above that point; the termperature drops to a minimum of 4,000 K, then begins to raise in the chromosphere, a layer about 7,000 kilometers high at a temperature of 8,000 K. During a total eclipse the chromosphere appears as a pink ring. Above the chromosphere is a dim, extended halo called the corona, which has a temperature of 1,000,000 K and reaches far past the planets.

The Core
The Sun's core has a tremendously high temperature and pressure. The temperature is roughly 15 million °C. At the temperature, nuclear fusion occurs, turning four hydrogen nuclei into a single helium nucleus plus a lot of energy. This 'hydrogen burning' releases gamma rays (high-energy photons) and neutrions (particles with no charge and almost no mass)

The Radiative Zone (or Radiation Zone)
It is the next layer which emits radiation. This radiation diffuses outwards. The temperature range from 15 million °C to 1 million °C. It may take photons of radiation millions of years to pass through the radiative zone, as they gradually make their way outwards.

The Convective Zone
In this layer, Photons continue to make their way outwards via convection (towards lower temperature and pressure). The temperature range from one million °C to 6,000 °C. 

The Photosphere
This is the lower atmosphere of the Sun and the part that we see(since it emits light at visible wavelengths). This layer is about 300 miles(500 Km) thick. The temperature is about 5,500 °C.

The Chromosphere
This reddish layer is an area of rising temperatures. The temperature range from 6,000 °C (at lower altitudes) to 5,000 °C (at higher altitudes). This layer is a few thousand miles thick. It appears red because hydrogen atoms are in an excited state and emit radiation near the red part of the visible spectrum. The Chromosphere is visible during solar eclipses.

The Corona
This is the outer layer of the Sun's atmosphere. The corona extends for millions of miles and the temperatures are tremendous, reaching one million °C.
Holes in the corona occur where the Sun's magnetic field loops out into space. These coronal holes may be the source of the solar wind, a stream of energetic particles that permeate the Solar System.

Detailed studies of the Sun's photosphere and the sunspots began with Galileo's telescopic camera obscura of the 17th centuary. Heinrich Schwabe, a german scientist in 1840 found out that the number and positions of sunspots vary over an 11-year period. In 1859 British astronomer Richard Carrington discovered solar flares. In 1908 American astronomer George Ellery Hale showed that sunspots contain magnetic fields that are thousands times stronger than Earth's magnetic field.
Next :- Space Missions to Sun
Get Free Updates:
*Please click on the confirmation link sent in your Spam folder of Email*
Next Post »
1 Comments for "Competitive Examination Notes - 007"

Good thing today, everyone can potentially discover work with the online world. You actually have no need to difficulty you to ultimately move coming from a organization for the other only to job search engine, find jobs.

Warning message
ഈ സൈറ്റ് ഏതെങ്കിലും സ്ഥാപനങ്ങളുമായി ബന്ധപ്പെട്ടിട്ടില്ല. ഏതെങ്കിലും വ്യക്തികളോ സ്ഥാപനങ്ങളോ ഈ സൈറ്റിന്റെയോ അനുബന്ധ സൈറ്റുകളുടെയോ പേരിൽ പണം മേടിക്കുകയാണെങ്കിൽ അത് നിങ്ങളുടെ സ്വന്തം ഉത്തരവാദിത്വത്തിൽ പെടുന്നതായിരിക്കും. ഈ സൈറ്റിനോ ഇതിനോട് അനുബന്ധിച്ചുള്ള സൈറ്റുകൾക്കോ ആ ഇടപാടുമായി യാതൊരു ബന്ധവും ഉണ്ടായിരിക്കുന്നതല്ല. അങ്ങനെ പണമിടപാടുകൾ നടത്തുന്ന സ്ഥാപനങ്ങൾ നിങ്ങളുടെ ശ്രദ്ധയിൽ പെടുകയാണെങ്കിൽ ഈ സൈറ്റിനെ അറിയിക്കുക. വിലാസം :- or SMS me on 8547883412
Thanks for Your Visit, Visit Again. DISCLAIMER :- If any of the information available on this blog violates or infringes any of your copyright protection, leave a comment . This blog makes no representations as to accuracy, completeness, correctness or validity of any information on this site and will not be liable for any errors, or delays in this information. The information contained in this blog is subject to change without notice. All the content avilable on this blog is informational purpose only.Reproduction and republishing of contents from here to any other websites or blogs is strictly prohibited.
Template By Kunci Dunia