Detección de la polarización en el fondo cósmico de microondas utilizando DASI. Interferómetro de escala angular de

J M Kovac1, E M Leitch, C Pryke

  • 1Department of Physics, Center for Astrophysical Research in Antarctica, University of Chicago, 5640 South Ellis Avenue, Chicago, Illinois 60637, USA. john@hyde.uchicago.edu

Nature
|December 20, 2002
PubMed
Resumen

Los científicos detectaron polarización en la radiación cósmica de fondo de microondas (CMB). Este hallazgo apoya firmemente el modelo cosmológico estándar y sus conclusiones sobre el origen y la evolución del Universo.

Videos de Conceptos Relacionados

Atomic Absorption Spectroscopy: Interference01:25

Atomic Absorption Spectroscopy: Interference

Interference leads to systematic error in atomic absorption (AA) measurements by enhancing or diminishing the analytical signal or the background. These interferences can be grouped into three main categories: spectral interference, chemical interference, and physical interference.
Spectral interference occurs when signals from other elements or molecules overlap with the analyte signal, falsely elevating or masking the analyte's absorbance. This interference can be corrected using Zeeman,...
Atomic Emission Spectroscopy: Interference01:30

Atomic Emission Spectroscopy: Interference

In atomic emission spectroscopy (AES), high-temperature atomizers excite a broad range of elements and molecules that generate complex emissions from sources such as oxides, hydroxides, and flame combustion products in the flame or plasma. Several strategies can be employed to minimize spectral interferences caused by overlapping emission lines or bands. These include increasing instrument resolution, choosing alternative emission lines, optimally placing the detector in low-background regions,...
Electronic Distance Measuring Instruments01:30

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over short distances...