Question

what do you mean by lateral displacement on what factors does it depends​

Answer 1

After refraction from A glass slab, the emergent ray emerges parallel to the actual direction of the incident ray. The distance between them is called the lateral displacement. Factors on which it depends are:

• Thickness of glass slab: more the thickness more the lateral displacement
• Refractive Index: more the refractive index more the lateral displacement
• Wavelength: More the wavelength of the colour of light, less is the displacement. Displacement for red is the least, while displacement for violet the most.