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Science
Physics
Optical Physics
Light and Waves Vocabulary
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Terms in this set (18)
Wavelength
Distance between two peaks or two troughs
Peak/Crest
Highest point in a wave
Trough
Lowest point in a wave
Pigment
Molecules that will absorb certain wavelengths
Reflection
When light bounces off a surface
Visible light color that carries the least amount of energy
Red light
Visible light color that carries the most amount of energy
Violet light
Absorption
When light is "captured" by the surface
Color when all light is absorbed
Black light
Color when all light is reflected
White light
Transparent
Objects that allows all light to pass through
Translucent
Objects that allow some light to pass through
Opaque
Objects that do not let any light pass through
Amplitude
Determines how much energy the light wave will carry
High frequency wave
Waves that carry a lot of energy and have short wavelengths
Low frequency wave
Waves that carry small amounts of energy and have long wavelengths
Pitch of a sound is determined by its _______
Frequency
Volume or how loud a sound can be is determined by its ________
Amplitude
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Verified questions
PHYSICS
Sand is composed of $$ \mathrm { SiO } _ { 2 } $$ . Find the order of magnitude of the number of silicon (Si) atoms in a grain of sand. Approximate the sand grain as a sphere of diameter 0.5 mm and an $$ \mathrm { SiO } _ { 2 } $$ molecule as a sphere of diameter 0.5 nm.
PHYSICS
A rock band (with loud speakers) has an average intensity level of 110 dB at a distance of 15 m from the band. Assuming the sound is radiated equally over a hemisphere in front of the band, what is the total power output?
PHYSICS
a.Which states of a hydrogen atom can be excited by a collision with an electron with kinetic energy K = 12.5 eV? Explain. b. After the collision the atom is not in its ground state. What happens to the electron? (i) It bounces off with K > 12.5 eV, (ii) It bounces off with K = 12.5 eV, (iii) It bounces off with K < 12.5 eV, (iv) It is absorbed by the atom. Explain your choice. c. After the collision, the atom emits a photon. List all the possible $n \rightarrow m$ transitions that might occur as a result of this collision.
PHYSICS
A hydraulic lift in a garage has two pistons: a small one of cross-sectional area $4.00\ \mathrm{cm}^{2}$ and a large one of cross-sectional area $250\ \mathrm{cm}^{2} .$ (a) If this lift is designed to raise a 3500-kg car, what minimum force must be applied to the small piston? (b) If the force is applied through compressed air, what must be the minimum air pressure applied to the small piston?