GK
PHYSICS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
non-luminous heavenly bodies
|
|
|
luminous heavenly bodies that twinkle
|
|
|
luminous heavenly bodies that do not twinkle
|
|
|
luminous heavenly bodies revolving around a star
|
Detailed explanation-1: -Planets revolve around the sun in an elliptical orbit. They are non-luminous bodies that do not twinkle. Mercury, Venus, Earth, and Mars are called terrestrial planets, and Jupiter, Saturn, Uranus, and Neptune are called gaseous planets.
Detailed explanation-2: -A non-luminous object is one that does not produce its own light, although it can still reflect light from other sources. The Moon is an example of a non-luminous object; we can only see the Moon because it reflects light from the Sun (which is a luminous object).
Detailed explanation-3: -All of the planets and moons reflect light (the light from the sun bounces off them) and absorb light but they don’t emit light, so we say they are non-luminous.
Detailed explanation-4: -All planets are non luminous because it doesn’t have light of its own and reflects the light of the sun and other luminous celestial bodies.
Detailed explanation-5: -The Sun is a non-luminous object.