GHY 104 1st Edition Lecture 3 Ch. 2: Solar Energy to Earth and the Seasons Continued.The Electromagnetic Spectrum- Radiant energy from the Sun moves to Earth fast- The energy itself can be broken down into several posts, known as the Electromagnetic Spectrum.- Energy is emitted from all objects- Sun radiates shortwave energy.- Shorter wavelengths have higher energy.- Earth and everything on it radiates longwave energy- Longer wavelength have lower energyEarth’s Energy Budget- Objects radiate energy in wavelength related to their surface temperatures- Hotter objects = shorter wavelengths- Surface of Sun= hotter; short wavelengths- Surface of Earth- cooler; longer wavelengthsReasons for Seasons- Revolution - Earth revolves around the Sun- Voyage takes one year- Earth’s speed is 107, 280 kmph- Forms plane of the ecliptic - Rotation- 24 hours to complete 1 rotation at 1041 mph at equator - Tilt of Earth’s axisThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Axis connects North and South Poles - Axis is tilted 23.5⁰ from the plane of the ecliptic, one of the most important concepts- Axial parallelism- Axis maintains alignment during orbit around the Sun- The Earth’s axis points toward the North Star (Polaris) always.- Sphericity- Produces uneven receipt of isolationSubsolar point: the point on the Earth’s surface where the sun is directly overhead, forming a 90⁰
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