Radiation of Visible light 1

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

The sun, stars, candles and light bulb are luminous objects.

• True

• False

Light travels in straight lines.

• True

• False

Although light travels in straight lines, its movement through a medium causes waves.

• True

• False

The image alongside shows..

(select all that apply)

• a pinhole camera

• light travelling in straight lines

• an inverted image

• a non-luminous object (candle)

Which of the following is true about light? (Select all that apply)

• Light travels at a speed of

  300 000km/s

• Light travels faster than sound

• The speed of light is 30 million km / s

Study the image alongside and decide whether they are opaque , transparent or translucent.

• Glass cup =opaque

  Mirror = opaque

• Glass cup =Translucent

  Mirror = opaque

• Glass cup =Transparent

  Mirror = opaque

• Blue has a longer wavelength than red

• Red has a longer wavelength than blue

• Blue has a shorter wavelength than indigo.

The frequency of a wave is the number of waves that move past a point one second. Which light has a higher frequency?

Type in blue OR red.

Write you answer in 'seconds'

use the word seconds in your answer.