The number of wavelengths that pass a given point every second.
The shortest wavelength radio waves.
A radio antenna that collects radio waves or microwaves.
Telescopes that use mirrors to collect and focus light.
Telescopes that use convex lenses to collect and focus light.
Telescopes in orbit above Earth's atmosphere.
Horizontal distance from wave crest to wave crest, or wave trough to wave trough.
SC.1.E.5.1 Observe and discuss that there are more stars in the sky than anyone can easily count and that they are not scattered evenly in the sky.
SC.1.E.5.3 Investigate how magnifiers make things appear bigger and help people see things they could not see without them.
Objects can be seen if light available to illuminate them or if they give off their own light. (1-PS4-2)
Some materials allow light to pass through them, others allow only some light through and others block all the light and create a dark shadow on any surface beyond them, where the light cannot reach. Mirrors can be used to redirect a light beam. (Boundary: The idea that light travels from place to place is developed through experiences with light sources, mirrors, and shadows, but no attempt is made to discuss the speed of light.) (1-PS4-3)
Grade Readability 2.7 (430L)