Year End Revision Part 2/2

All forms of light that we can see with our eyes is termed: .............. ...........

The image alongside shows..

• A. light travelling in straight lines

• B. an inverted image

• C. a demonstration of the movement of light

• All of the options A, B & C

• Blue has a longer wavelength than red

• Red has a longer wavelength than blue

• Blue has a shorter wavelength than indigo.

Select the INCORRECT statement / description

• the speed of light is 300 000 km

• One light year is 10 trillion km

• One light year is 10 000 000 000 000 km

• A light year is the distance light travels in one year

An asteroid is 3000 million km away from Mars.

This distance can be written as ..

• 3 billion

  (3 000 000 000 )

• 30 billion

  (30 000 000 000)

• 3 trillion

  (3 000 000 000 000)

An effect of electric current can be breaking down substances. The diagram alongside shows..

• Thermal decomposition

• Electrolysis

• Chemical decomposition

The weaker magnetic field will be in ...

• electromagnet A

• electromagnet B

Name the type of reflection that can be observed in the picture

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When all light is absorbed by an object, it will appear ..

• Black

• White

• Translucent

• Transparent

Provide the correct term for the following definition: When a light ray approaches a smooth polished surface and the light ray bounces back. _________