Sound
sound needs a ________________ to travel.
medium
what type of wave is Visible light?
Electromagnetic Wave
Electromagnetic Spectrum so not need a medium which means they can travel though empty space.
true or false
true
what type of wave is used to transmit information from broadcasting antennas to a radio antenna.
radio waves
Regular reflection occurs when paralell rays of light hit a smooth surface. True or false. Light bouncing from a lake it is consider regular reflection.
true
Sound are mechanical waves. What type of mechanical wave is sound?
longitudinal
What are the three primary colors of light. When you combined them it produces white light.
Red, Green, Blue
which EM wave has the longest wavelength?
besides radio waves, cell phones can also receive _____________.
microwave
a mirror that curves inward is consider a
concave mirror
the space where particles of a sound wave are far apart is called ___________________ while where the particles are closed toguther, the space is called_____________.
rarefaction, compression
What are the 3 primary color of pigment and when you combined them it turns black
Magenta, yellow and cyan
Which EM has the shortest wavelength and the highest amount of energy.
gamma rays
AM waves change _______________ while FM changes ________________
Amplitud, frequency
a mirror that curves outward is a
convex mirror
The speed of sound depends on this three factors, ______________,__________________ and _____________ of the medium the sound travels.
temperature, stiffness and density
a window is a ______________ object.
wax paper is a ______________ object.
An apple is an ________________ object.
transparent, translucent, opaque
Electromagnetic waves that are used to see broken bones are called
X-ray
which wave AM or FM has higher frequency
FM
a plane mirror has a
focal point
increase in stiffness means __________ in speed
increase in density means ___________ in speed
decrease in temperature means ___________ in speed
increase, decrease, decrease
give the light spectrum in order from longest wavelength to shorter.
red, orange, yellow, green, blue, indigo, violet
say the EM from longest wavelenght to shorter
radio, microwave, infrared, visible light, UV ray, X-ray and gamma ray.
a satellite TV system includes communication satellites and satellites dish _______________
antenna
reflected and refract