Tag: origin of universe

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Questions Related to origin of 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 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.

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 large bright stars with a cool surface of ${2000}^{o}C$ to ${3000}^{o}C$, formed during the later stages of the evolution of a star like the sun as it runs out of ${H} {2}$ fuel at its center are __________.

  1. red dwarf

  2. white dwarf

  3. red giants

  4. brown dwarf
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Large bright stars with a cool surface of 2000oC to 3000oC, formed during the later stages of the evolution of a star like the sun as it runs out of H2 fuel at its center are Red giants

Ans: Red giants

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

Horse head Nebula in Orion are dense clouds of molecular hydrogen which partially or completely absorb the light from the stars behind them. These are called ___________.

  1. planetary nebula

  2. dark nebula

  3. reflection nebula

  4. emission nebula
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Horse head nebula are called dark nebula.

Ans: Dark Nebula