Explanation

Astrology deals with how the positions and movements of celestial bodies influence human behavior and fate.

It is different from astronomy, which is the scientific study of celestial objects.

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Explanation

Electromagnetic waves, including light, travel at the same speed in a vacuum.

It is approximately 299,792 kilometers per second.

Explanation

Equinox occurs when the sun is vertically above the equator.

At this time, the sun equally illuminates the Southern and Northern hemisphere.

At this time the world experiences equal day and night.

Equinox occur twice a year.

The months are March and September.

Explanation

In solids, particles mainly exhibit vibrational motion about their fixed positions.

They have limited translational and rotational motion compared to liquids and gases.

Explanation

Optical disk drives (like CD, DVD, and Blu-ray drives) use laser technology to read and write data on optical discs.

The laser beam detects the pits and lands on the disc surface to interpret data.

Explanation

The troposphere is the lowest layer of the atmosphere, directly in contact with the Earth's surface.

It is where weather occurs and contains about 75% of the atmosphere’s mass.

The principle constituent of the atmosphere of the Earth is called Nitrogen.

Explanation

 Angular momentum (L) is defined as the cross product of the position vector (r) of a particle with its linear momentum (p) relative to a chosen origin. 

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