Light travels very fast at a speed of 300 000km/h.

• True

• False

A nanometer is a billionth of a meter.

• True

• False

White light is made up of 7 colors.

• True

• False

Which item(s) are luminous?

• lit candle

• sun

• moon

• unlit candle

A lamp shade will diffuse light.

• True

• False

Which of the following are examples of refraction?

• candle

• prism

• rainbow

• eye glasses

We see a red apple because red is absorbed and the rest of the colors are reflected.

• True

• False

A pair of sunglasses are…

• translucent

• transparent

• opaque

A calm lake will diffuse less light than one where the water is disturbed.

• True

• False

A brick wall is…

• translucent

• transparent

• opaque