Answer:
The wavelength and frequency of light are closely related. The higher the frequency, the shorter the wavelength. Because all light waves move through a vacuum at the same speed, the number of wave crests passing by a given point in one second depends on the wavelength.
Explanation:
The frequency of a light wave is how many waves move past a certain point during a set amount of time -- usually one second is used. Frequency is generally measured in Hertz, which are units of cycles per second. Color is the frequency of visible light, and it ranges from 430 trillion Hertz (which is red) to 750 trillion Hertz (which is violet). Waves can also go beyond and below those frequencies, but they're not visible to the human eye. For instance, radio waves are less than one billion Hertz; gamma rays are more than three billion billion Hertz.Wave frequency is related to wave energy. Since all that waves really are is traveling energy, the more energy in a wave, the higher its frequency. The lower the frequency is, the less energy in the wave. Following the above examples, gamma rays have very high energy and radio waves are low-energy. When it comes to light waves, violet is the highest energy color and red is the lowest energy color. Related to the energy and frequency is the wavelength, or the distance between corresponding points on subsequent waves. You can measure wavelength from peak to peak or from trough to trough. Shorter waves move faster and have more energy, and longer waves travel more slowly and have less energy.Aside from the different frequencies and lengths of light waves, they also have different speeds. In a vacuum, light waves move their fastest: 186,000 miles per second (300,000 kilometers per second). This is also the fastest that anything in the universe moves. But when light waves move through air, water or glass, they slow down. That's also when they bend and refract.
Answer:
a)
0.245 m/s
b)
0.904 m
Explanation:
a)
= speed of duck ahead of wave
= speed of surface wave = 0.32 m/s
T = time for paddling = 1.6 s
d = spacing between the waves = 0.12 m
speed of duck ahead of wave is given as
= - 
= 0.32 - 
= 0.245 m/s
b)
= speed of wave behind the duck
speed of wave behind the duck is given as
= +
= 0.32 + 0.245
= 0.565 m/s
D = spacing between the crests
spacing between the crests is given as
D = T
D = (0.565) (1.6)
D = 0.904 m
Superconducting materials don't generate anything.
But since their electrical resistance is zero, it's possible
to push a huge current through them without loss, and it's
the huge current that sets up a strong magnetic field around
the conductor.
I think it would be clean and store.
Decay of Ar-40 produces 1.33 mmol of K-40. Remaining number of moles of Ar-40 is 1.50 mmol. Initial mmol of Ar-40 present will be sum of number of moles of K-40 and remaining number of moles of Ar-40.
now, half life time of the reaction is 
For first order reaction, rate constant and half-life time are related to each other as follows:
Putting the value of 
,
Rate equation for first order reaction is as follows:
![t=\frac{2.303}{k}log\frac{[A_{0}]}{[A_{t}]}}](https://tex.z-dn.net/?f=t%3D%5Cfrac%7B2.303%7D%7Bk%7Dlog%5Cfrac%7B%5BA_%7B0%7D%5D%7D%7B%5BA_%7Bt%7D%5D%7D%7D)
Here, ![[A_{0}]](https://tex.z-dn.net/?f=%5BA_%7B0%7D%5D)
is initial concentration and ![[A_{t}]](https://tex.z-dn.net/?f=%5BA_%7Bt%7D%5D)
is concentration at time t.
Therefore, time required to cool the rock is 
.
