Discovery of the big bang

    Redshift refers to :

• Light appearing brighter from distant objects.

• Light being absorbed by dust in space.

• The stretching of a light wave's wavelength as it travels.

• A new color added to light from distant galaxies.

  According to the Doppler effect, redshift of light from a celestial object indicates :

• The object is composed mostly of red elements.

• The object is not moving relative to Earth.

• The object is moving towards Earth.

• The object is moving away from Earth.

The observation of a red shift in the light from most distant galaxies is evidence for :

• The universe being static and unchanging.

• The Milky Way galaxy being at the center of the universe.

• The universe undergoing a continuous cycle of expansion and contraction.

• The universe expanding over time (supported by the Big Bang theory).

The amount of redshift observed can be used to determine:

• The object's distance from Earth.

• The object's temperature.

• The object's composition.

• The object's size.

Redshift is the opposite of:

• Infrared light.

• Blueshift.

• Ultraviolet light.

• Cosmic microwave background radiation.

   Which of the following statements about redshift is NOT true :

• Redshift affects all types of electromagnetic waves, not just visible light

• A larger redshift indicates a faster relative velocity away from Earth.

• Redshift can only be caused by the Doppler effect.

• Studying the redshift help us understand the structure of the universe

If a distant galaxy exhibits no redshift, what can we suppose about its motion relative to Earth?

• It must be composed of mostly red-colored objects.

• It is definitely moving towards Earth at high speed.

• It is either stationary or moving away from Earth at a very slow speed

• It is too far away to determine its motion with certainty.

   Technology has allowed astronomers to measure redshift with high precision. This is important because it helps us :

• Predict future events in the universe.

• Directly measure the age of distant galaxies.

• Calculate the exact composition of stars in those galaxies.

• Confirm and refine our understanding of the universe's expansion.

If Galaxy A exhibits a greater redshift than galaxy B. What can we conclude ?

• Galaxy B is older than galaxy A.

• Galaxy A is definitely larger in size than galaxy B.

• Galaxy A is moving away from Earth at a faster speed than galaxy B.

• Earth is definitively closer to galaxy A than to galaxy B.

The concept of redshift is crucial in the field of :

• Planetary geology

• Weather forecasting

• Cosmology

• Agricultural science