Which of the following is not a luminous object?a)Sunb)Candlec)Moond)Tube-lighte)None of the above/More than one of the aboveCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Object which do not emit light on their own are known as non- luminous objects.
Moon does not emit its own light and therefore is a non-luminous object.
Moon is visible only when it reflects light from the sun.

Key points:-
Moon is not a luminous body, because it has no lights of its own.
Moon is a non-luminous object because it not emits it’s own light but reflect the light coming from the sun.

Answer

Object which do not emit light on their own are known as non- luminous objects.
Moon does not emit its own light and therefore is a non-luminous object.
Moon is visible only when it reflects light from the sun.

Key points:-
Moon is not a luminous body, because it has no lights of its own.
Moon is a non-luminous object because it not emits it’s own light but reflect the light coming from the sun.

Answer

The Moon is not a luminous object.

The Moon is not a luminous object because it does not produce its own light. Instead, it reflects sunlight that falls on its surface. The Moon's surface is made up of rocks and dust, which do not emit light. When sunlight hits the Moon, it bounces off its surface and reaches our eyes, making the Moon appear bright in the night sky.

The Sun is a luminous object.

The Sun is a luminous object because it emits its own light. It is a massive ball of hot gases, primarily hydrogen and helium, undergoing nuclear fusion in its core. This fusion process releases an enormous amount of energy in the form of light and heat. The light emitted by the Sun travels through space and reaches the Earth, providing us with warmth and illumination during the day.

A Candle is a luminous object.

A candle is a luminous object because it produces light through a chemical reaction called combustion. When the wick of a candle is lit, the heat from the flame melts the wax near the wick. The liquid wax is drawn up the wick and vaporizes, combining with oxygen from the air to produce a flame. This flame emits light and heat, making the candle glow.

A Tube-light is a luminous object.

A tube-light is a luminous object because it contains a gas (typically mercury vapor) that emits ultraviolet (UV) light when an electric current passes through it. The inside of the tube is coated with a phosphor material that absorbs the UV light and re-emits it as visible light. This conversion process produces the light that is emitted by the tube-light, making it a luminous object.

Therefore, the Moon is the only object among the given options that is not a luminous object.

Answer

Object which do not emit light on their own are known as non- luminous objects.
Moon does not emit its own light and therefore is a non-luminous object.
Moon is visible only when it reflects light from the sun.

Key points:-
Moon is not a luminous body, because it has no lights of its own.
Moon is a non-luminous object because it not emits it’s own light but reflect the light coming from the sun.

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