Ch 24.1 The Study of Light

Electromagnetic spectrum arrangement of waves according to their wavelengths and frequencies.

• gamma    Short wavelength  High frequency
• x-rays        
• ultravoilet radiation
• visible light
• infrared
• microwaves
• radiowaves              Long wavelength  Low  frequency

Doppler Effect the change in frequency of a wave due to movement of the source of the wave.

Wavelength are shortened as the source moves toward the observer  and lengthened as the source moves away from the observer.

Short wavelengths are blue in color, long waves lengths are red in color.

What color would be the shift if a galaxy is moving away from Earth?

RED

Spectroscopy is the study of the properties of light that depend on wavelength.

Continuous spectrum includes

ROYGBIV