Lenses and Mirrors
What is a concave mirror?
Its a mirror that bends inwards.
Which type of wave has the lowest frequency on the electromagnetic spectrum?
Radio waves
What shape splits white light into a rainbow?
Prism
What is the thin clear layer on the outer part of your eye called?
The cornea is the clear, outer part of the eye's focusing system located at the front of the eye.
What is the distance between waves called?
Wavelength
What is a convex mirror?
A convex mirror is a mirror that bends outwards
How many different types of waves are on the electromagnetic spectrum?
There are 7 different types of waves
What is white light made of ?
White light is a combination of all colours in the colour spectrum
What does the optic nerve do?
The optic nerve brings information to the brain.
What are waves measured in?
Waves are measured in Hertz
The bending of light as it travels from one medium is?
Refraction
Which frequency on the electromagnetic spectrum has the highest frequency?
Gamma rays have the shortest wavelengths, and the highest frequencies
Is phosphorescence chemical or natural light?
When light such as ultraviolet light is shined upon a glow in dark object, the object emits light, creating phosphorescence.
which part of your eye monitors the amount light going in?
The iris controls the amount of light passing through. The iris opens and closes the pupil to control the amount of light entering the eye.
What is amplitude?
Amplitude is the distance between the top of the wave and the rest position
Images created by convex mirrors are always?
smaller than the object
How much percent of the electromagnetic spectrum can humans see?
About 0.0035 percent.
What is the band of colour with the longest range of wavelengths?
Red has the longest wavelength, at around 700 nanometers.
What does the sclera do in the eye?
The sclera, or white of the eye, is strong tissue that wraps around your eyeball. It helps maintain your eye's shape and protects it from injury.
What happens when the wave length increases?
Its frequency and energy decreases
How does light get absorbed?
When electrons absorb the energy in the light wave.
Can you name all the wave types on the electromagnetic spectrum?
radio waves, microwaves, infrared radiation, ultraviolet rays, X-rays and gamma rays
What are light waves made of?
Light waves are forms of moving energy made of tiny microscopic particles called photons.
Which special cells in your retina see different light frequencies (colours) and send them to your brain?
Special cells called rods and cones live in the retina. These cells are the eye's lookouts. Their job is to spot light and let the brain know about it. Different rods and cones react to different wavelengths, or colours, of light.
How do you find the frequency of the waves?
Speed of the wave divided by the wavelength.