What is the wavelength in nm of a light whose first order bright band forms a
1 answer:
The wavelength of the first order bright band light light is 714 nm .
Explanation:
We have to find the wavelength of the first order brightness of a light. Here we are using Huygen's principle of light.
The formula is
nλ =d sinθ
where, n is the order of maximum
λ is the wavelength of light
d is the distance between the lines on diffraction grating.
θ is the angle.
For the given equation n is 1 because the problem states that the light forms 1st order bright band
λ is unknown.
d = or 0.0000014 m
sin (30) = 0.5
so,
1(λ) = (0.0000014)(0.5)
= 0.0000000714
= 714 nm
Thus, The wavelength of the first order bright band light light is 714 nm .
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Answer:
d. 6/5 M.
Explanation:
let the angular velocity =
the radius of sphere (r) =
moment of inertia of solid sphere =
rotational K.E of solid sphere=
=
we represent the mass of hallow sphere=
moment of inertia of solid sphere =
rotational K.E of hollow sphere=
=
NOW,the kinetic energy of solid sphere= 1/2 kinetic energy of hallow sphere
=
2/5M= 1/3
= 3(2/5M)
= 6/5 M