Understanding Light and Sleep

What is the name of the light source that can’t be seen by the human eye?

• Infrared light

• Ultraviolet light

• Visible light

• Fluorescent light

What light source is blue light stronger than?

• Red light

• Green light

• Yellow light

• Infrared light

What part of the eye deteriorates after long exposure to blue light?

• Cornea

• Retina

• Iris

• Lens

Give 2 reasons why LED lights are used?

• They are expensive and consume more energy

• They are energy-efficient and have a long lifespan

• They produce a lot of heat and are fragile

• They are dim and have a short lifespan

What is the name of the hormone that helps your body prepare for sleep?

• Insulin

• Melatonin

• Adrenaline

• Cortisol