Task 3.3
Under the action of a cargo weighing 200 g, the spring is stretched by 6.2 cm. The load was reported kinetic
Energy 0.02 J and he began to make a harmonic oscillation. Determine the frequency and amplitude
Fluctuations.
Task 3.13
The equation of a plane electromagnetic wave propagating in a medium with? = 1, has the form
E = 10 sin (6.28 × 108t-4.19x).
Determine the dielectric constant of the medium and the wavelength.

PROBLEM 3.23
White light at an angle of 45 ° falls on the soap film. For what is the smallest film thickness
The reflected rays will be colored green (? = 0.54 microns)? Refractive index of soapy water
1,33.
Task 3.33
A regularly parallel beam of monochromatic light with a length of
Waves of 0.45 microns. Find the width of the central diffraction maximum on the screen remote from the slit
On 1 m.

Task 3.43
Natural light falls on the surface of the dielectric at an angle of total polarization. Coefficient
The reflection of light is 0.085. Find the degree of polarization of the refracted ray.

Task 3.53
Find the ratio of the group velocity to the phase velocity for light with a wavelength of 0.6 μm in a medium with an exponent
Refraction ratio is 1.5 and the variance is 5 • 104 m-1.

Task 3.63
Considering that the Sun radiates as a black body, determine the intensity of solar radiation near
Of the Earth. The surface temperature of the sun is assumed to be 5780 K.
Task 3.73
The zinc electrode is illuminated with monochromatic light. The photocurrent terminates with a retentive
Potential difference 0.4 V. Calculate the wavelength of light used in lighting.