Final answer:
The Doppler Effect equation in the context of light waves allows us to calculate the radial velocity of an object using the formula v = c×(Δλ/λ), taking into account the shift in observed wavelength due to the object's movement.
Step-by-step explanation:
The Doppler Effect refers to the change in frequency or wavelength of a wave in relation to an observer moving relative to the source of the wave. When we consider light, the Doppler Effect equation helps us calculate the radial velocity of an object if we know the speed of light (c), the original wavelength (λ), and the observed wavelength shift (Δλ). The Doppler Effect for light can be described using the formula: v = c×(Δλ/λ), where v represents the radial velocity, c is the speed of light, and λ is the original wavelength.
This equation is particularly useful in astronomy to determine whether a star or other celestial body is moving towards or away from us. If the observed wavelength is greater (redshift), the object is moving away; if the observed wavelength is less (blueshift), the object is moving toward us. The sign of v denotes the direction of motion: positive for recession, negative for approach. By using this principle, scientists can understand more about the velocities and movement patterns of stars and galaxies. It also has practical applications on Earth, such as radar speed checks conducted by highway patrol officers.