Answer:
240 nm
Explanation:
In the interference in thin films , light reflected from upper surface and light reflected from the lower surface of oil are made to interfere each other to form fringes due to path difference of 2μt .
a ) An additional phase shift of 180 ° occurs on the upper surface because light is going from optically rarer medium to denser medium .
b ) There is no such change on reflection from lower surface as light is going from denser to rarer medium ( air ).
c ) For destructive interference the path difference which is equal to 2 μ t should be equal to n λ where n is any number
So for given condition
2 μ t = n λ
For minimum thickness
2 μ t = λ ( n =1 )
t = λ / 2μ
= 600 x 10⁻⁹ /( 2 x 1.25 )
= 240 nm
Answer:t=0.54 s
Explanation:
Given
Jacob is traveling 5 m/s in North direction
Jacob throw a ball with a in south direction with a velocity of 5 m/s
Ball is thrown in opposite direction of motion of car therefore it seems as if it is dropped from car as its net horizontal velocity is 5-5=0
Time taken by ball to reach ground
t=0.54 s
Motion of ball will be straight line
A method to prove if the statement is true is by trial and error method. Since we are already given different sets of values, we can try to see if they match the given conditions: (consecutive, odd integers):
Looking at the choices:
A. consecutive odd integers (OK)
(-7) + (-9) + (-11) = -27
Since the integers in choice A match the statement, then choice A is the correct answer.
yeah cucumber is used for us telescope
Answer:
190v I believe
hope this helped a little and if it did pls mark brainiest :)