Answer:
Hence the order of the bright fringe is 7.
Explanation:
Diffraction can be defined as the deviation from rectilinear propagation and diffraction grating is used to measuring the wavelength of light using a spectrometer.
We have the formula d sin∅ = n l
We have to find the value of n in this equation and all other values are given.
Here d = 55000 lines
∅ = 12.23°
Wavelength , l = 550 nanometer
n is the order of the bright line.
Substitute these values in the given equation,
55000
sin(12.23°) = n
n = 7
Hence the order of the bright fringe is 7.
Answer:
D
Explanation:
Remember that magnets only attract at different poles. If both poles are the same, they repel
The wavelength of the radio photon is 268 m.
Electromagnetic waves travel with the speed of 3×10⁸m/s in vacuum. The speed of a wave <em>c i</em>s related to its frequency<em> f</em> and wavelengthλ as follows:
Thus the wavelength is given by,
Substitute 3×10⁸m/s for <em>c</em> and 1120×10³Hz for <em>f</em>.
Thus the wavelength of the radio photon from an AM station is 268 m
Answer:
shadow is formed when an opaque object comes on path of light shadows are formed because light travels in a straight line and it can't pass through an opaque object
Answer:<span>Humid air is lighter, so it has lower pressure.
The reason is the molecules of water are H2O, whose molar mass is 18 g/mol.
These molecules displaces molecules of N2 and O2, whose molar masses are:
N2: 2*14g/mol = 28 g/mol, and
O2: 2*16g/mol = 32 g/mol.
Then molecules of 28g/mol and 32 g/mol are being replaced with molecules of 18g/mol, leading to a lower weight of the same volume of air, which results in lower pressure.
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