12P10 Wave Optics

Chapterwise Study notes

NEET past year Questions, Solutions

NCERT competency based questions 2024, Solutions

NCERT competency based questions 2023, Solutions

NCERT Exemplar Questions, Solutions

To refresh your Waves concepts visit Related Chapter 11P14 Waves page

Introduction to waves, Water, Sound, Light waves.

What is the difference between the two graphs shown?

Can you move the Electric field sensors to different locations and plot the Electric Field?

Huygens Principle, Secondary Wavelets, 

Wavefront, Plane and Spherical Wavefront, 

Location of Wavefront in any instant

Secondary wavelets at interface of two mediums,

Refraction of rarer to denser and denser to rarer,

and Reflection.

What is Interference? 

Water waves on the surface

Interference of Light 

Demonstration using Gratings in the classroom

What happens to the fringe width if we change the wavelength, slit gap and screen location? What happens if we change the location of the laser behind the slits?

Interference of Light 

Demonstration using Phet Interactive Simulations

What happens to the fringe width if we change the wavelength, slit gap and screen location? What happens if we change the location of the laser behind the slits?

Student Hashmitha's Double Slit Experiments, 

Is this interference or diffraction experiment? 

Can you do such an experiment yourself to demonstrate it to your friends in your class?

Young's Double slit, The Original Double Slit Experiment

Double slit Interference and Single slit Diffraction 

White Light through Diffraction grating gives VIBGYOR Spectrum why? 

What is the colour of the central bright fringe? 

Which is closer to the central bright fringe, Violet or Red?

What do we mean by path difference? How does it impact the formation of Bright fringes, Dark fringes and Central Bright fringe? Can you find the relation between wavelength, path difference and the bright or dark fringe formation?

2D top view of waves from two sources interfering. Vary the slit gap d and Colour of light wavelength Lambda to see the effect on the fringe width.

3D view of interference of light from a laser source and gratings

What is Diffraction? 

If I put a thin wire (small obstacle) in the path of laser light, I thought I will see a shadow of the wire, But I see something different? 

What is a Diffraction pattern? How do we explain it?

3D Illustration for Polarization of Light from Geogebra

What is Polarization of Light? What is a Polarizer?

How does the rotation of a Polarizer affect the intensity of the polarized light? 

What happens if the 2nd Polarizer is kept in-line with the 1st Polarizer, what happens if it is rotated 90 degrees or other angles?

Activity: Keep two Polarizer perpendicular to each other. What is the intensity of light coming out? Now introduce another 3rd polarizer between the 1st and the 2nd. Rotate the 3rd polarizer and observe what happens? Explain your observations.