What does a spring balance measure
2 answers:
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Answer:
angular width is 0.10 degree
Explanation:
Given data
width = 340 nm
separation d = 790 nm
λ = 520 nm
to find out
how many maxima and width of a spectral line
solution
we know for maxima formula is
m λ = dsinθ
and we know here sinθ is between 0 and 1
so we can say
d is greater than m λ
and
m ≤ d / λ
m ≤ 790 / 520
m ≤ 1.52
its mean we have 3 maxima i.e. 0 , 1 and -1
and
for 1st order m = 1
so mλ = dsinθ
λ = dsinθ
θ = sin^-1 ( λ/d) ................................1
and angular width is
θ = λ/ Nd cosθ
θ = dsinθ / Nd cosθ
θ = tanθ /N ...............................2
so here put θ in 2 equation
angular width = tanθ/N
angular width = tan ( sin^-1 ( 520/790) ) / 500
angular width = tan 41.16 / 500
angular width = 1.7484 × × 180/π
angular width = 0.10 degree
Answer:
<em>1.2 cm</em>
Explanation:
<u>Thermal Expansion</u>
It's the tendency that materials have to change its size and/or shape under changes of temperature. It can be in one (linear), two (surface) or three (volume) dimensions.
The formula to compute the expansion of a material under a change of temperature from to
is given by.
Where Lo is the initial length and is the linear temperature expansion coefficient, which value is specific for each material. The data provided in the problem is as follows:
Computing the expansion we have
The expansion gap should be approximately 1.2 cm