The Human Eye and Light Waves

This part of the eye carries the message from your eye to the part of your brain that controls vision. 

• cornea
• lens
• optic nerve
• retina

In dim light, your pupil will be 

• larger
• smaller

In bright light, your pupil will be

• larger
• smaller

The part of your eye that gives it its color.  It is a muscle that controls the size of your pupil.

• cornea
• lens
• pupi
• iris

The first part of the eye that light hits. 

• lens
• cornea
• pupil
• retina

In order for your brain to process the light waves that enter your eye, what must your eye do to those waves before sending them to the brain?

• Nothing, the light waves just get sent to the brain.

• Light waves have to be converted into sound waves by the eye.

• Light waves have to be converted into electrical signals by the eye.

• Light waves have to be refracted by the eye.

Which portion of the electromagnetic spectrum includes the entire range of light that can be detected by the human eye? 

• ultraviolet light
• visible light
• infrared light
• x-rays

If the wavelength of an electromagnetic wave is longer, what is true about the energy? 

• Energy is higher.
• Energy is lower. 
• Energy is not dependent on wavelength. 

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Which part of the electromagnetic spectrum has high enough energy to cause damage to eyes and skin, and sometimes even cancer? 

• infrared light
• visible light
• ultraviolet light
• microwaves

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_____ have the longest wavelengths and lowest frequencies of all electromagnetic waves.

• microwaves
• radio waves
• gamma rays
• ultraviolet

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