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Lecture

DOPPLER EFFECT.docx

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Department
Natural Science
Course
NATS 1740
Professor
Campineau
Semester
Winter

Description
NATS1740 SECOND TEST STUDY GUIDE ASTRONOMY DOPPLER EFFECT - Change in frequency of waves because of relative motion between observer & the source - Each successive wavecrest is released from a progressively greater source & arrives later then it would if source was motionless - Blue-Shift: When an object in space moves toward us, it’s light waves are compressed into higher frequencies & it’s wavelengths are compressed - Red-Shift: When an object moves away from us, it’s light waves are stretched into shorter frequencies or longer wavelengths OPTICAL TELESCOPES - Larger the lens diameter, longer focal length & the image obtained. - Convex Lenses: Objective, Focal Point, Eye-Piece, Eye - Concave & Convex reflective lenses mirror: Secondary mirror, Primary mirror, eye-piece REDUCED VISIBILITY - Optical telescopes have to be at high altitude, because most wavelengths are bad for ground observation (radio/microwave) - High-resolution radio observations  Interferometers. - Balloons, high altitude planes/satellites, equipped with s
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