Light Shadows and Reflections Test - 1

Explanation:

The object through which light can pass easily are called transparent object.In the case of objects that are transparent, all of the light waves pass through. Transparent objects exhibit complete transmission of the light waves through the object. An object looks transparent because light waves pass through unchanged.

Explanation:

A device that forms camera like image of the bright object on screen is called pinhole camera.It consist of a closed box with a screen at one end and a pinhole at the other end.It uses the fact that the light going in through the pinhole travels in straight lines to the screen.

Explanation:

A lunar eclipse occurs when the Moon passes directly behind the Earth into its shadow.This can occur only when the sun, Earth, and moon are aligned exactly, or very closely so, with the Earth in the middle. Hence, a lunar eclipse can occur only the night of a full moon.

Explanation:

Sun is a natural luminous body that emits their own light.

Explanation:

Speed of light is fastest in vaccum in comparison to water, glass and diamond. The fastest thing in the whole universe is the speed of light in a vacuum , clocking in at a great 2.99 x 10⁸ m/s. Light travels in waves, and we call this traveling propagation. Propagation of waves has both a speed and a direction, called the velocity.

Explanation:

The bodies which have its own source of energy to emit light are called luminous bodies. Example: Stars, burning candle, sun, etc.

Explanation:

The bodies which have its own source of energy to emit light are called luminous bodies. Example: Stars, burning candle, sun, etc.

The bodies which are not able to emit light but are visible only when they reflect light produced by the luminous objects are called non-luminous bodies. Example: earth, blackboard, moon.

Explanation:

All planets are non-luminous body because they do not emit their own light.

Explanation:

The shadow can be seen only on a screen .The ground, walls of a room a building, or other such surfaces act as a screen for the shadows you observe in everyday life.

Explanation:

Shadow is formed by opaque object obstructing the path of light.