Out of the entire range of visible light waves, those that have the highest frequency and shortest wavelengths are perceived by normal human eyes as violet.
Answer:
- 58 cm
Explanation:
refractive index, n = 1.6
radius of curvature of left face, R1 = - 65 cm
Radius of curvature of the right face, R2 = 75 cm
Use the lens maker's formula
![\frac{1}{f}=\left ( n-1 \right )\times \left ( \frac{1}{R_{1}}-\frac{1}{R_{2}} \right )](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bf%7D%3D%5Cleft%20%28%20n-1%20%5Cright%20%29%5Ctimes%20%5Cleft%20%28%20%5Cfrac%7B1%7D%7BR_%7B1%7D%7D-%5Cfrac%7B1%7D%7BR_%7B2%7D%7D%20%5Cright%20%29)
![\frac{1}{f}=\left ( 1.6-1 \right )\times \left ( -\frac{1}{65}-\frac{1}{75} \right )](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bf%7D%3D%5Cleft%20%28%201.6-1%20%5Cright%20%29%5Ctimes%20%5Cleft%20%28%20-%5Cfrac%7B1%7D%7B65%7D-%5Cfrac%7B1%7D%7B75%7D%20%5Cright%20%29)
![\frac{1}{f}=\left ( 0.6 \right )\times \left ( \frac{-75-65}{75\times 65}\right )](https://tex.z-dn.net/?f=%5Cfrac%7B1%7D%7Bf%7D%3D%5Cleft%20%28%200.6%20%5Cright%20%29%5Ctimes%20%5Cleft%20%28%20%5Cfrac%7B-75-65%7D%7B75%5Ctimes%2065%7D%5Cright%20%29)
f = - 58 cm
Thus, the focal length of the lens is - 58 cm.
Answer:
D
Explanation:
The atmosphere is made up of constituents not chemically combined unlike the rest of the options...
The atmosphere is made up of O2, N2, etc. and they are not chemically combined, hence the atmosphere is a mixture
Order to ensure a message is understood requires all four option is needed.
The option will be D.All of the above.
<h3>
What is a good communication skill?</h3>
- The sender is the person who is trying to communicate a message.
- The challenge is that since the receiver’s education and experience may be very different from the sender's, words often have different meanings.
- While we may carefully choose the words to speak, words alone represent a small percentage.
- communication is only verbal the most important element of communication
- When encountering a noise, take steps to reduce the distraction.
Learn more about speaking skills here:-brainly.com/question/25645043
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The answer is the equator because the equator in receives sunlight all year round and has a constant average temperature all year round so it is least likely to affect the seasons.