1G2 5.5 Applications of Light

Which type of radiation can we see?

• infrared radiation

• ultraviolet radiation

• light

• microwave

What type of radiation can be found in thermal imaging camera?

• infrared radiation

• light

• ultraviolet radiation

• x-ray

What is/are harmful effect(s) of infrared radiation? [Select all options]

• harmful to human body

• contribute to climate change

• increase risk of cancer

• cause light pollution

How does infrared radiation contribute to climate change?

• It escapes Earth's atmosphere, cooling the planet.

• It reflects sunlight away from the Earth.

• It is trapped in the atmosphere, causing the temperature on Earth to increase.

• It blocks ultraviolet rays from reaching the surface.

What type of radiation can be found in steriliser?

• infrared radiation

• light

• microwave

• ultraviolet radiation

What is/are benefits of exposure to ultraviolet radiation? [Select all options]

• Increases production of vitamin D.

• Enhances plant photosynthesis.

• Cleans and sterilizes medical equipment.

• Improves night vision in humans.

What is a harmful effect of ultraviolet radiation?

Who invented the first commercial light bulb?

• Isaac Newton

• Thomas Edison

• Albert Einstein

• Louis Pasteur

What do plants need to photosythesise? [Select all options]

• Light

• Carbon Dioxide

• Water

• Sugar

Describe one application of visible light in our daily life