Click for money

Friday, March 7, 2014

This Day in Science History - March 6 - Joseph von Fraunhofer

March 6th is Joseph von Fraunhofer's birthday. Fraunhofer was a German physicist who discovered thin dark bands while investigating the sun's spectrum. Bunsen and Kirchhoff later discovered that they corresponded to the wavelengths of the absorption of common elements like hydrogen, helium and iron. The energy from the sun would pass through the upper layers of the sun and get absorbed, causing the dark lines. These lines are now known as "Fraunhofer lines" in his honor.

No comments:

Post a Comment

পর্যায় সারণী মনে রাখার সহজ কৌশল

মনে রাখবেন, আপনাকে যেকোন উপায়ে মনেরাখতেই হবে। সেটা শুনতে খারাপ, ভাল হয়নি এরুপ ভাবলে কখনও মনে রাখতে পারবেন না। আরব্যতিক্রমী না হলে আপনি কখনও...

Popular posts