Multiple choice general knowledge science & technology

A black hole can be observed on a very clear night using a very high power astronomical telescope as __.

  1. a very shining dot in sky.

  2. a blck dot among countless shining stars

  3. a reddish dot in sky

  4. like a star only but it doesn't twinkle.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Black holes themselves are invisible because no light can escape them. However, we can observe them indirectly through their gravitational effects on surrounding matter, such as accretion disks of superheated gas emitting radiation, or stars orbiting an invisible mass. Against a bright background like a starfield, a black hole appears as a dark silhouette blocking light from behind it.

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