Red Shift & Big Bang

Red-shift

Increase in wavelength of light from moving objects.

Big Bang

The event marking the universe's origin 13.7 billion years ago.

Cosmic Microwave Background Radiation (CMBR)

Radiation echoing from the Big Bang, currently 2.7K.

Wavelength

Distance between two identical points on successive waves.

Spectral lines

Features in spectra indicating speed and direction of motion.

Distant galaxy

Galaxy moving away, exhibiting red-shift in light.

Hydrogen and helium proportion

Key evidence supporting the Big Bang theory.

Longer wavelength

Occurs when an object moves away from the observer.

Shorter wavelength

Occurs when an object moves towards the observer.

Absorption spectra

Spectra showing light absorption, revealing chemical composition.

Echo of the Big Bang

CMBR represents remnants of the universe's early state.

Red-shift evidence

Supports the expansion of the universe post-Big Bang.

Galaxy motion

Direction and speed inferred from spectral line shifts.

Temperature of CMBR

Currently measured at approximately 2.7 Kelvin.

Galaxy moving towards Sun

Exhibits blue-shift in its spectral lines.

Greater red-shift

Indicates faster recession of a galaxy from Earth.

Evidence for universe's age

CMBR, elemental proportions, and red-shift data.

Moving away light

Light from receding galaxies appears red-shifted.

Blue-shift

Decrease in wavelength from an object moving towards observer.

Galaxy speed measurement

Determined by analyzing shifts in spectral lines.

Expansion of the universe

The universe is continuously growing since the Big Bang.

Age of the universe

Estimated at 13.7 billion years based on evidence.