Light
how do we call the objects that don´t give light out?
non-luminous
how do we call the image we see on a mirror?
virtual image
What is refraction?
When light changes its direction.
What is the name of the muscles that control the size of the pupil?
iris
Mention the name of two non-contact forces.
gravity force
electromagnetic force
electrostatic force
is frosted glass a translucent, opaque, or transparent object?
translucent
What is the name of the ray of light that hits the mirror?
incident ray
What is the concept that Physics give to the materials where light can travel through?
What are the name of the two photoreceptors we have in our eyes?
rods and cones
How is force measure?
in Newtons (N).
What is the speed of light?
300 000 km/s
What is the name of the reflection that happens in a smooth surface?
specular reflection
What shape do the lens in our eyes have?
convex
What is the name of the outer part of the eye that focuses light?
cornea
Which is the speed of sound in the air?
340 m/s
How much time does it take to light to arrive from the Sun to Earth?
8 minutes
What is the name of the reflection that happens in a rough surface
diffuse scattering
Once the rays pass through the lens, they gather in a specific place that is called...
focal point
What is the name of the thing that sends signals to the brain about what we see?
optic nerve
Which is the range of the audible range?
20 to 20000 Hz
Which is the distance from the Sun to Earth
150 million km.
What does the law of reflection say?
When light is reflected from a mirror the angle of incidence is equal to the angle of reflection.
What do lens do with light?
they focus it
The are some cameras that have a a grid of photosensitive picture elements, or pixels.
What does CCD means in those objects?
charge-coupled device
What is the name of the part of the ear that helps you to keep balance and don't fall?
ossicles :v