Top 1000+ GK Questions and Answers Pdf - 2

Question: 6

Which eclipse is seen very often?

Lunar eclipse is seen very often.

Question: 7

Define the velocity of light?

The distance travelled by light in one second is called as the velocity of light. The velocity of light in air or vacuum is 3x10⁸ m/s or 3,00,000 km/s.

Question: 8

What is lateral inversion?

If you stand before a plane mirror and raise your right hand, your image in the plane mirror appears to raise your left hand. This is known as lateral inversion.

Question: 9

What are called virtual image and real image?

An image which cannot be caught on a screen is known as virtual image.

An image which can be caught on a screen is known as real image.

The image we see on the cinema screen is real image.

Question: 10

What are the differences between a compound microscope and an astronomical telescope?

Compound microscope

To magnify the nearer objects.

The objective lens will be of shorter focal length.

Astronomical telescope

To magnify and to get distinct image of a far object.

The objective lens will be of larger focal length.