Free problems arranged by topic
 Kinematics Dynamics Conservation laws Thermodynamics Waves Electricity Magnetism Optics Fluids and elasticity Ideal gas AC current

 Free problems: all problems
 Kinematics Dynamics Conservation laws Thermodynamics Waves Electricity Magnetism Optics Fluids and elasticity Ideal gas AC current

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# Physics problems:Optics

Part 1

Problem 1.

A person stands 40 m from a flag pole. With a protractor at eye level, he finds the angle at the top of the flag pole with the horizontal is 25.0 degrees. How high is the flag pole? The distance from his feet to his eyes is 1.8 m.

Solution

Problem 2.

The frequency of yellow light is . Find the wavelength of yellow light. The speed of light is .

Solution

Problem 3.

Light is incident from air on the surface of a glass slab. In the air the light beam makes an angle of  with the normal to the surface, while in the glass the angle is . What is the index of refraction of the glass?

Solution

Problem 4.

Light is incident from air on the surface of a glass slab, which has an index of refraction of 2.5. In the air the light beam makes an angle of  with the normal to the surface. What is the angle of the beam with the normal in the glass?

Solution

Problem 5.

A diffraction grating produces a first-order maximum at an angle of . What is the angle of the third order maximum?

Solution

Problem 6.

A diffraction grating produces a second-order maximum at an angle of . What is the angle of the first-order maximum?

Problem 7.

A light with the wavelength of 600 nm illuminates a diffraction grating. The angular distance between two m=1 bright fringes is . What is the spacing between slits on the screen?

Solution

Problem 8.

A light with the wavelength of 550 nm illuminates a single slit and the diffraction pattern is observed on a screen 0.9 m behind the slit. The width of the slit is 0.1 mm. What is the distance between the first and the third minima on the screen?

Solution

Problem 9.

A light with the wavelength of 660 nm illuminates a single slit and the diffraction pattern is observed on a screen 1.2 m behind the slit. The distance between the second and the third minima on the screen is 3.5 mm. What is the width of the slit?

Problem 10.

In a single-slit experiment, the third minimum is observed at . What is the wavelength of the light if the width of the slit is 0.1 mm?

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