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Science in the Beginning Lessons 9-12

Across
Having the property of allowing light to pass through
Light that cannot be seen by human eyes but is used in certain devices, like microwave ovens.
A flexible transparent fiber which guides or transmits light with little or no loss of energy.
The transparent outer covering of the eye
A device that bends light to focus or defocus an image.
The eye tissue that detects light.
Down
The process by which light passes through an object.
Light-sensing cells in the eye; these cells detect only the presence of absence of light.
The nerve that sends information from the eyes to the brain.
The section of the retina that cannot detect light.
Light-sensing cells in the eye; these cells detect color.