lenses (part 1)

Lenses used in the .......................

• cameras

• medical glasses

• binoculars

• all the previous things

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

NGSS.HS-PS4-5

Concave lens is called ............... lens.

• diverging

• converging

• collecting

• no correct answer

The convex lens .......................

• is thin at the centre and more thickness at the tips.

• is thick at the tips and less thickness at the centre.

• collects the light rays falling on it.

• diverges the light rays falling on it.

The straight line that joins between the two centres of curvature of the lens and passes through its optical centre is called ........................

• the focal length

• the principle axis

• the secondary axis

• the radius of curvature

The lens is a transparent medium that reflects the light and is defined with two spherical.

• True

• False

The convex lens is a converging lens.

• True

• False

The concave lens collects the rays fall on it.

• True

• False

The optical centre is a point inside the lens in the mid distance between its faces.

• True

• False

The straight line joining between the two centres of the lens curvature and passes through its optical centre is called radius of curvature.

• True

• False

Each lens has two centres of curvature.

• True

• False