Task 3.2
The amplitude of the velocity of a material point performing a harmonic oscillation is 8 cm / s, and
The acceleration amplitude is 16 cm / s2. Find the displacement amplitude and the cyclic frequency of the oscillations.
Task 3.12
In a homogeneous and isotropic medium with q = 2 and? = 1 a plane electromagnetic wave propagates.
Amplitude of the electric field strength of the wave is 50 V / m. Find the amplitude of the tension
Magnetic field and the phase velocity of the wave.
PROBLEM 3.22
In Young´s experiment, one of the slits was covered by a transparent plate 11 microns thick,
The central light stripe shifted to a position initially occupied by the tenth light stripe.
Find the refractive index of the plate if the wavelength of light is 0.55 μm.
Task 3.32
The diffraction pattern is observed at a distance of 0.8 m from the point source of a monochromatic
Light (? = 0.625 μm). In the middle between the screen and the light source is placed a diaphragm with a round
Hole. At what is the smallest diameter of the hole the center of the diffraction pattern will be dark?
Task 3.42
Natural light falls on a diamond crystal at an angle of complete polarization. Find the angle of refraction
Sveta.
Task 3.52
Calculate the difference between the phase and group velocity for light with a wavelength of 0.768 μm in glass,
If it is known that the refractive index for this wavelength is 1.511, and for a wavelength of 0.665
M, it is 1.514.
Task 3.62
The maximum emissivity of the Sun is 0.5 μm. Believing that the Sun
Radiates as a black body, determine the temperature of its surface and the radiation power.
Task 3.72
The cathode of a vacuum photocell is illuminated by light with a wavelength of 0.38 μm. The photocurrent stops when
Delaying the potential difference of 1.4 V. Find the work function of electrons from the cathode.
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