A polished metal plate with a rough black spot on it is heated to about $1400 K$ and quickly taken into a dark room. Then

The spot will appear brighter than the plate

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The spot will appear darker than the plate

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Heat conduction is easier downward

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It is easier and more convenient to do so

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Solution

The correct option is A The spot will appear brighter than the plate
When the body is heated to $1400 K$ , it absorbs a lot radiation. After heating and taken to a dark room, it begins to emit these radiations, hence the spot appears brighter in the dark room.

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A polished metal plate with a rough black spot on it is heated to about 1400 K and quickly taken into a dark room. Then

The correct option is A The spot will appear brighter than the plateWhen the body is heated to 1400 K, it absorbs a lot radiation. After heating and taken to a dark room, it begins to emit these radiations, hence the spot appears brighter in the dark room.

A polished metal plate with a rough black spot on it is heated to about $1400 K$ and quickly taken into a dark room. Then

The correct option is A The spot will appear brighter than the plate
When the body is heated to $1400 K$ , it absorbs a lot radiation. After heating and taken to a dark room, it begins to emit these radiations, hence the spot appears brighter in the dark room.