Tag: evolution of the universe

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Questions Related to evolution of the universe

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

What is the name of the hypothetical theory that would unify all the fundamental forces of nature?

  1. Grand unified theory

  2. Unified field theory

  3. Classical field theory

  4. Super grand unified theory
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A theory that would unify all four fundamental forces (gravity, electromagnetism, strong nuclear, and weak nuclear) is often referred to as a Theory of Everything or, in some contexts, a Super Grand Unified Theory.

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

The most persuasive evidence that favours the Big Bang theory is the.

  1. Existence of the cosmic microwave background radiations

  2. Birth and death of stars

  3. Presence of the blace holes in the universe

  4. Hubble law
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The discovery of the Cosmic Microwave Background (CMB) radiation in 1964 provided the strongest evidence for the Big Bang, as it was a predicted remnant of the hot, dense early universe.

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

The initial concept about the origin of universe was given by

  1. Bondi

  2. Hawllacks

  3. Narlikar

  4. Hubble
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Since Georges Lemaitre first noted, in 1927, that an expanding universe might be traced back in time to an originating single point, scientists have built on his idea of cosmic expansion. While the scientific community was once divided between supporters of two different expanding universe theories, the Big Bang and the Steady State theory, accumulated empirical evidence provides strong support for the former.In 1929, Edwin Hubble discovered indications that all galaxies are drifting apart at high speeds. In 1964, the cosmic microwave background radiation was discovered, which was crucial evidence in favor of the Big Bang
model, since that theory predicted the existence of background radiation throughout the Universe before it was discovered.

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

The wave length of light received from a distant galaxy is 0.5 % greater than that received from an identical source on the earth.the galaxy:

  1. Is stationary relative to the earth.

  2. Is moving towards the earth with velocity of light

  3. Is moving away from the earth with light velocity
  4. Is moving away from the earth with velocity $ 1.5 \times 10^9 m/s $
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The fractional change in wavelength is delta-lambda / lambda = 0.5% = 0.005. For non-relativistic speeds, v/c = delta-lambda / lambda. v = 0.005 * 3 * 10^8 m/s = 1.5 * 10^6 m/s. The option 1.5 * 10^9 m/s is likely a typo for 1.5 * 10^6 m/s.

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

It is believed that the Universe is expanding and hence the distant stars are receding from us. Light from such a star will show

  1. Shift in frequency towards longer wavelength

  2. Shift in frequency towards shorter wavelength

  3. No shift in frequency but a decrease in Intensity

  4. A shift in frequency sometimes towards longer
    and sometimes towards shorter wavelength
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

As the universe expands, light from distant receding galaxies is stretched, resulting in a shift toward longer wavelengths, which is known as redshift.

Multiple choice social science universe and space the big bang and the early development of the universe origin of universe evolution of the universe

Comets that return to view at regular intervals are called

  1. regular comets

  2. visiting comets

  3. periodic comets

  4. none of these
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Comets that orbit the sun in predictable, repeating paths are defined as periodic comets. These objects return to the inner solar system at regular intervals.