Light Dispersion and Refraction Concepts

The video tutorial explains the phenomenon of light dispersion by a prism, where white light splits into seven colors. It discusses the cause of dispersion, highlighting the role of wavelength and refractive index. The tutorial further explores refraction angles, angular dispersion, and the concept of dispersive power, providing formulas and calculations to understand these optical phenomena.

What phenomenon occurs when white light passes through a prism?

• Reflection

• Diffraction

• Refraction

• Dispersion

How many colors does white light split into when it passes through a prism?

• Seven

• Six

• Five

• Eight

What determines the color of light?

• Its wavelength

• Its speed

• Its intensity

• Its frequency

Which color of light has a wavelength of 4000 angstroms?

• Red

• Green

• Blue

• Violet

According to Cauchy's formula, what does the refractive index of a material depend on?

• Intensity

• Temperature

• Pressure

• Wavelength

Which color is refracted through a larger angle when entering a prism?

• Blue

• Violet

• Red

• Green

What is the term for the angular separation between the two extreme colors when white light passes through a prism?

• Angular reflection

• Angular refraction

• Angular dispersion

• Angular deviation

What does angular dispersion depend on?

• Speed of light

• Intensity of light

• Temperature and pressure

• Angle of the prism and nature of the prism material

What is the ratio of angular dispersion to the deviation of the mean ray called?

• Dispersive power

• Mean deviation

• Angular deviation

• Refractive index

On what does the dispersive power of a prism depend?

• Nature of the material of the prism

• Angle of the prism

• Intensity of light

• Speed of light