Mirror, Mirror on the Wall
What happens when light hits a shiny, smooth surface?
Reflection.
Name the part of the eye responsible for controlling the amount of light that enters.
Iris
What kind of image is formed by a plane mirror?
A virtual, upright image.
What is the longest wavelength in the electromagnetic spectrum?
Radio waves.
What do we call the height of a wave?
Amplitude.
The bending of light as it moves from air into water is called?
Refraction.
What part of the eye focuses light onto the retina?
Lens.
What happens to light rays when they pass through a convex lens?
They converge.
What part of the electromagnetic spectrum is used in remote controls?
Infrared radiation.
What unit measures the frequency of waves?
Hertz (Hz).
Why does a black object feel hotter than a white object in sunlight?
It absorbs more light and converts it to heat.
Why do we see objects in certain colors?
They reflect specific wavelengths of light and absorb others.
Which mirror would you use in a car’s side-view mirror and why?
A convex mirror because it gives a wider field of view.
Which type of electromagnetic wave has the highest energy?
Gamma rays.
Give an example of a transverse wave.
Light wave or water wave.
What is the law of reflection?
the angle of reflection equals the angle of incidence
What is the function of the optic nerve?
Transmits visual information to the brain.
What do you call the focal point where parallel light rays meet after passing through a lens?
Focus.
What makes ultraviolet light useful in sterilization?
It kills bacteria and viruses.
How are sound waves different from light waves?
Sound waves are longitudinal and require a medium; light waves are transverse and can travel through a vacuum.
What kind of mirror makes objects appear larger and closer?
Concave mirror.
How does the shape of the lens change to focus on nearby objects?
It becomes thicker.
Why does light travel slower in glass than in air?
Glass is denser, so light interacts more with its particles.
What is the visible light spectrum, in order of increasing frequency?
Red, orange, yellow, green, blue, indigo, violet.
What property of a wave increases as its wavelength decreases?
Frequency