Calculate. The nature of light (3)

Light from the Sun takes 8 minutes to reach the Earth. If you know the speed of light in space, what is the distance between the Earth and the Sun? There is a distance of ×10 kilometers between the Sun…

Unit 12: Waves. Light and sound

Amplitude (n): the distance between a crest or a trough and the equilibrium position of a wave. converging lens (n): a lens which concentrates the light which passes through it. deafness (n): not being…

Plants need light and water to grow

This resource shows us the factors affecting plant growth. We label the parts of a plant.

Calculate. The nature of light (1)

Calculate how far light travels in air in 20 s. In 20 s, light will travel .

Think about it. Light and colours

Remember what you have studied in this section and answer the questions: Why is snow white, coal black and grass green? → ...is... because it reflects... and absorbs... If light from the Sun can be…

Think about it. The nature of light

Remember what you have studied in this section and answer the questions: Look at the diagram of electromagnetic waves. State what happens to the wavelength, frequency and energy as you go from left to…

Learn. Noise pollution - Waves. Light and sound

Noise pollution Noise pollution is when there are sounds that are too intense and prolonged in a certain place. For example, sounds with an intensity higher than 55 decibels make it difficult for people…

Video:Cat coffee gets Halal green light

This 2 minute video by Aljazeera explains how the expensive Kopi Luwak coffee is produced in Indonesia. A kind of cat eats the coffee berries and once the droppings are cleaned and toasted they get a…

Experiment. How does the light travel.docx.pdf

End-of-unit activities - Waves. Light and sound

Perhaps you have seen one of the latest 3D films at the cinema with spectacular light and sound effects. But have you ever wondered what light is? Which mechanisms do we use to see objects and colours?…