The image would be 53 cm from the lens of your eye.
What is Lens?
A lens is a transmissive optical tool that uses refraction to focus or disperse a light beam. A compound lens is made up of multiple simple lenses (elements), typically arranged along a common axis, as opposed to a simple lens, which is one solid piece of transparent material. Glass or plastic are used to make lenses, which are then polished or moulded into the desired shape. In contrast to a prism, which simply refracts light without focusing it, a lens can focus light to create an image. Lenses are also devices that focus or disperse waves as well as radiation other than visible light, such as <u>explosive lenses, microwave lenses, particle lenses, and acoustic lenses</u>.
Lenses are a common component of <u>telescopes</u><u>, binoculars, and cameras, among other imaging devices</u>.
To learn more about Lens
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Answer:
Part(a): The frequency is
.
Part(b): The speed of the wave is
.
Explanation:
Given:
The distance between the crests of the wave,
.
The time required for the wave to laps against the pier, ![t = 5.0~s](https://tex.z-dn.net/?f=t%20%3D%205.0~s)
The distance between any two crests of a wave is known as the wavelength of the wave. So the wavelength of the wave is
.
Also, the time required for the wave for each laps is the time period of oscillation and it is given by
.
Part(a):
The relation between the frequency and time period is given by
![\nu = \dfrac{1}{T}~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(1)](https://tex.z-dn.net/?f=%5Cnu%20%3D%20%5Cdfrac%7B1%7D%7BT%7D~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%281%29)
Substituting the value of
in equation (1), we have
![\nu &=& \dfrac{1}{5.0~s}\\~~~&=& 0.2~Hz](https://tex.z-dn.net/?f=%5Cnu%20%26%3D%26%20%5Cdfrac%7B1%7D%7B5.0~s%7D%5C%5C~~~%26%3D%26%200.2~Hz)
Part(b):
The relation between the velocity of a wave to its frequency is given by
![v = \nu \lambda~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(2)](https://tex.z-dn.net/?f=v%20%3D%20%5Cnu%20%5Clambda~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~%282%29)
Substituting the value of
and
in equation (2), we have
![v &=& (0.2~Hz)(2.5~m)\\~~~&=& 0.5~m/s](https://tex.z-dn.net/?f=v%20%26%3D%26%20%280.2~Hz%29%282.5~m%29%5C%5C~~~%26%3D%26%200.5~m%2Fs)
Answer:
<h2>Non-Ionizing Radiation From Wireless Technology
</h2>
Radiofrequency (RF) energy is a type of electromagnetic radiation. It is used to transmit signals carrying information in the form of radio waves. Radio waves are broadcast using a transmitter. When the radio waves reach a receiver, the signal is converted back into the information that was originally sent by the transmitter. When you talk on a cell phone, your cell phone acts as a transmitter and your voice is carried on radio waves to the person you are calling. Their phone acts as the receiver and converts the signal back into your voice. In addition to cell phones, other wireless devices such as radios, Wi-Fi routers, satellites, radars and pacemakers can send or receive RF energy waves.
Answer:
d//
Explanation:
there is a total fat content of 8 grams
Answer:
54%
Explanation:
We are given that
S.D=4.2 lb
Mean=![\mu=9.4 lb](https://tex.z-dn.net/?f=%5Cmu%3D9.4%20lb)
We have to find the percentage of household throw out at least 9 lb of paper a week.
Normal distribution formula :
![P(X\geq a)=P(z\geq \frac{a-\mu}{\sigma})](https://tex.z-dn.net/?f=P%28X%5Cgeq%20a%29%3DP%28z%5Cgeq%20%5Cfrac%7Ba-%5Cmu%7D%7B%5Csigma%7D%29)
We have a=9
![P(X\geq 9)=P(z\geq \frac{9-9.4}{4.2})=P(z\geq -0.1)](https://tex.z-dn.net/?f=P%28X%5Cgeq%209%29%3DP%28z%5Cgeq%20%5Cfrac%7B9-9.4%7D%7B4.2%7D%29%3DP%28z%5Cgeq%20-0.1%29)
![P(X\geq 9)=1-P(z](https://tex.z-dn.net/?f=P%28X%5Cgeq%209%29%3D1-P%28z%3C-0.1%29)
%
Hence, the percentage of household throw out at least of paper a week=54%