Newton's rings

What is Newton's rings method used for?

• Measuring the thickness of a thin film

• Measuring the refractive index of a material

• Measuring the angle of incidence of light

• Measuring the speed of light

What is the interference pattern observed in Newton's rings method?

• Fringes of equal thickness

• Fringes of equal intensity

• Fringes of equal wavelength

• Fringes of equal colour

What is the cause of the interference pattern in Newton's rings method?

• Reflection of light

• Refraction of light

• Diffraction of light

• Interference of light

How does the spacing of the fringes in Newton's rings method relate to the thickness of the thin film?

• The thicker the film, the wider the spacing

• The thinner the film, the wider the spacing

• The thicker the film, the narrower the spacing

• The thinner the film, the narrower the spacing

What is the role of the plano-convex lens in Newton's rings method?

• To produce a parallel beam of light

• To focus the light on the thin film

• To refract the light to produce an interference pattern

• To diffract the light to produce an interference pattern

What are the limitations of using Newton's rings method to measure the thickness of a thin film?

• It can only be used for thin films of a certain thickness range

• It is not very accurate

• It is very time-consuming

• It can only be used with certain types of light sources

If a scientist wants to measure the thickness of a thin film using Newton's rings method, what additional information do they need to know?

• The angle of incidence of the light

• The refractive index of the thin film

• The wavelength of the light

• The speed of light