The physics phenomenon when in polar regions like Alaska and Northern Canada a splendid display of c...........

Static GK (CPO) Geography

The physics phenomenon when, in polar regions like Alaska and Northern Canada, a splendid display of colours is seen in the sky is called a/an:

star's intrinsic luminosity

star shower

active galactic nucleus

aurora borealis

- Option 1: Star's intrinsic luminosity

- This is a measure of the total energy emitted by a star per unit time.

- It pertains to the inherent brightness of stars, not to colorful sky displays.

- Option 2: Star shower

- Incorrectly phrased, possibly meant as "meteor shower."

- Meteor showers are celestial events with numerous meteors in the sky, not the colorful displays in polar regions.

- Option 3: Active galactic nucleus

- A highly energetic region at the center of some galaxies, outshining the rest of the galaxy.

- Not related to atmospheric phenomena on Earth.

- Option 4: Aurora Borealis

- Known as the Northern Lights, this is indeed the splendid display of colors seen in the polar sky.

- Caused by the interaction of solar wind with Earth's magnetic field.

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