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

light: wavelength, frequency, and speed

Problem 2.

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

Solution

Problem 20.

A light wave has wavelength 600 nm in vacuum. What is the wavelength of the light as it travels through water (index of refraction = 1.33)?

Solution

Problem 30.

How long does it take for light to travel a distance of 10 m in vacuum?

Problem 31.

How long does it take for light to travel a distance of 5 m in water (index of refraction 1.33)?

Solution

Problem 36.

Light of wavelength 650 nm is incident normally on a soap film (index of refraction = 1.33) suspended in air. What is the least thickness of the film for which the reflection from the film undergoes fully constructive interference?

Problem 59.

The index of refraction of benzene is 1.5. What is the velocity of light in benzene?

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