It takes nd/ (lambda*f) time or a short pulse of light to travel from one end of the glass to the other.
If we talk about free space, that is, vacuum, light travels at a speed of 3x10^8 m/s, yet inside a glass light travels at a speed of v= c/n, where v is the velocity of the light and n is the refractive index. Now,
v=d/t,
so t= d/v
t= d/ (c/n)= n*d/c
c= lambda*f
t= nd/(lambda*f)
here, d is the thickness of the block, t is the time required and c refers to speed of light.
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Answer: Brute force attack
Explanation:
Brute force attack is the attack that is carried out by pressing every key from the device to crack the correct username and password of any authorized user .It is considered as the hacking technique in which attacker captures the network of the user.
To counter brute force attack, neutralizing the system is possible solution before attacker can access the network. If the attacker enters the network then preset number of login attempts should be implemented on the system.In this way, account will get disabled after determined number of failed attempts.
Thus, the attacker would not have the opportunity to try every key for gaining the right password and username.
Answer: We as humans slightly continue the hunter gatherer lifestyle with hunting animals, fishing, and farming. We also have gardens which is from the creation of domestication of animals and the creation of agriculture.
Explanation:
Answer:
B.Northern Securities controlled all freight service between Chicago and Los Angeles.
Explanation:
He knew what he wanted to do.
