unit 3 revision

What happens when...?

The nebula loses its temperature in Laplace's opinion

Show by drawing only the formation of the image equal to the object by means of

a convex lens.

person stands at 3 m from a plane mirror, so the distance between the person and his image is ------------

A light ray that falls on a plane mirror as in the figure it

reflected where the reflection angle equals------

Mention the properties of the formed image by the concave lens.

sc. term @:

it contains all the galaxies, stars, planets and living organisms,

Show by drawing only the formation of a virtual, upright and magnified image by

using the spherical mirror.

The vision defect which is due to a shortness in the radius of the ball is called

------------

The ------------- is located in one of the spiral arms of

on the edge of the galaxy.

Show scientific reason for each of the following:

The angle of reflection of a light ray fall perpendicular on a plane mirror = zero.