During an observation, it was noticed that light travels as bundles containing certain amounts of energy. What does this evidenc
1 answer:
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Answer:
73.67 m
Explanation:
If projected straight up, we can work in 1 dimension, and we can use the following kinematic equations:
,
Where its our initial height,
our initial speed, a the acceleration and t the time that has passed.
For our problem, the initial height its 0 meters, our initial speed its 38.0 m/s, the acceleration its the gravitational one ( g = 9.8 m/s^2), and the time its uknown.
We can plug this values in our equations, to obtain:
note that the acceleration point downwards, hence the minus sign.
Now, in the highest point, velocity must be zero, so, we can grab our second equation, and write:
and obtain:
Plugin this time on our first equation we find:
Answer:
119.42 x 10⁻³ m
Explanation:
The distance of first dark fringe from central bright spot will be equal to the width of fringe .
Fringe width = λL /w
where λ is wavelength of light, w is slit width , L is distance of screen .
So required distance
=
= 119.42 x 10⁻³ m