Motion and Energy Light

electric, magnetic Light is vibrating _____________ and ____________ energy.

perpendicular 2. Light waves vibrate in directions _______________ to the direction of motion.

Wavelength 3. _____________________ is the distance between one peak and the next in a wave.

frequency 4. The number of vibrations a wave makes in a given amount of time is its ________________________.

light rays 5. Light travels in straight lines is called __________ __________.

photons 6. Particles of light are called ______________________.

reflection 7. When light strikes an objects surface, photons bounce off. ________________ is the term for any wave that hits a surface and bounces off.

absorption 8. Sometimes when light hits an object, a photon is absorbed. ________________ is the transfer of energy when a wave disappears into a surface. Darker objects absorb more light than lighter objects.

transparent, translucent, opaque 9. If most light goes through an object, the object is _______________; if some light goes through, the object is _______________; if no light goes through, the object is _______________. Plastic wrap Wax paper Aluminum Foil Transparent Translucent Opaque

shadows 10. Objects that do not allow light to pass through cause ____________________.

scattering 11. When light strikes an object with a rough surface, photons bounce off at random angles. This is called ___________________________.

concave, convex 12. Mirrors can be made with a curved surface; if they curve in, they are __________________, and if they curve out they are _________________.

upright, reduced 13. Curved mirrors can form many kinds of images. They might be upright or upside down. Convex mirrors always produce images that are __________ and ______________.

speed, bending 14. When light enters a different medium, its speed changes and it undergoes _______________. Refraction is the ___________ of waves as they pass from one substance to another.

prism 15. White light is a mixture of many different wavelengths that can be separated by a _____________ to form a spectrum.

prism, spectrum 16. A _____________________ is a cut piece of clear glass or plastic in the form of a triangle or other geometric shape. The band of color in a rainbow, or from light passing through a prism, is called a _______________.

electromagnetism 17. The way in which electric and magnetic forces interact is called ___________________________.

electromagnetic 18. Many forms of ____________ radiation cannot be seen with the human eye.

Sun 19. The ___________ can produce all forms of electromagnetic radiation.

Explain how a magnifying glass helps people see objects that are small. A magnifying glass uses a convex lens to produce an image that is larger than the object. This allows things that are small to be seen on a much larger scale.