What is most likely the color of the light whose second-order bright band forms an angle of 13.5° if the diffraction grating has
2 answers:
Answer : The color of light is red.
Explanation :
Given that,
Numbers of lines in a diffraction grating, n = 175 lines per mm
The grating equation for the bright band is given by :
d sinФ = n λ
Where,
d is the distance between the slits
Ф is the angle to maxima
n is the order, n = 2
λ is the wavelength of the light.
Since, d = 1/N
N is the numbers of lines
So,
converting mm to m
λ = 6.66 × 10⁻⁷ m
or
λ = 667 nm
This shows the wavelength of red light. So, the color of light emitted will be red.
Hence, this is the required solution.
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Answer:
Distance, d = 61.13 ft
Explanation:
It is given that,
Initial speed of the car, u = 50 mi/h = 73.34 ft/s
Finally, it stops i.e. v = 0
Deceleration of the car,
We need to find the distance covered before the car comes to a stop. Let the distance is s. It can be calculated using third law of motion as :
s = 61.13 ft
So, the distance covered by the car before it comes to rest is 61.13 ft. Hence, this is the required solution.