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jordantay208
09.12.2019 •
Physics
Light of wavelength 588.0 nm illuminates a slit of width 0.68 mm. (a) at what distance from the slit should a screen be placed if the first minimum in the diffraction pattern is to be 0.89 mm from the central maximum? m (b) calculate the width of the central maximum. mm
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Ответ:
(a) 1.029 m
(b) 1.78 mm
Solution:
As per the question:
Wavelength of light,![\lambda = 588\ nm](/tpl/images/0410/6379/f17e4.png)
Slit width, w = 0.68 mm
Now,
The distance first minimum in the diffraction pattern,![y_{1} = 0.89\ mm](/tpl/images/0410/6379/afb31.png)
Now,
(a) For first minima:
where
D = Distance from the screen
D = 1.029 m
(b) The width of the central maxima is given by:
2y =![2\times 0.89 = 1.78\ mm](/tpl/images/0410/6379/83b86.png)
Ответ:
Explanation:
By definition, the density of the substance is given by:
D = \frac{m}{V}D=
V
m
Where,
m: mass of the substance
V: volume of the substance
Calculating the volume of the substance we have:
V = (50) * (10) * (30) V = 15000 cm ^ 3V=(50)∗(10)∗(30)V=15000cm
3
Then, replacing values we have:
D = \frac{3300}{15000}D=
15000
3300
D = 0.22 \frac{g}{cm^3}D=0.22
cm
3
g