1 Many people find that boxes with a 1.25 or 1 1/8 hole restrictor on them before an egg is laid are not utilized, even by smaller birds like titmice and chickadees. 2  If the entrance hole is enlarged (e.g., by woodpeckers or chewing rodents), put a hole reducer on it.
The Doppler effect widens the spectral lines of rotating objects because the wavelengths changes from blue or red. Blue-shifted, red-shifted, and non-shifted photons mix together to get how its rotating.
Section 24.1 The Study of Light This section describes the electromagnetic spectrum and how scientists usespectroscopy to study it. It also explains the Doppler effect and how it is usedin astronomy.he study of the properties of light that depend on wavelength is. A(n) uses wire mesh as a reflector to collectradiation from space. The siren from an ambulance that is approaching you seems louderbecause of the. Galileo used a(n) that had a lens to bend light.