Solar System
Moon light reaches to earth in ———- seconds?
A. 0.3 seconds
B. 1.3 seconds
C. 2.3 seconds
D. 1.3 seconds
The Sky appears blue because the earth’s atmosphere—————-?
A. Scatters blue light
B. Reflects blue light
C. Transmits blue light
D. Has actual blue cover
He was the scientist to prove that Planets move around the Sun?
A. Archimedes
B. Galileo Galilei
C. John Kepler
D. None of these
The atmosphere of moon consist of——?
A. 90% Hydrogen, 10% Nitrogen
B. 80%Nitrogen, 20% Hydrogen
C. 60% Nitrogen, 40%inert gases
D. None of these
An astronaut inside a spacecraft is in a state of weightlessness. This implies that?
A. The mass of the astronaut is reduced to zero.
B. Gravity inside the spacecraft ceases to act.
C. The astronaut is outside the influence of the earth’s gravitational force.
D. The astronaut and the spacecraft are both in a free-failing state.
The sun appears red at sunrise and sunset while it appears white at noon, because?
A. Of refraction
B. It is cooler at sunrise and at sunset
C. Of diffraction leading to red end of the spectrum reaching the earth.
D. Of Scattering of light due to dust particles and air molecules
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