Light Reflection And Refraction Class 10 previous year questions

Refraction & Reflection of Light

A light ray suffers reflection and refraction at the boundary in passing from air to water. Draw a neat labelled ray diagram to show it.

Assertion :- When monochromatic light is incident on a surface separating two medium, the reflected and refracted light has same frequency as incident light. Reason :- Reflection and refraction arise through interaction of incident light with atoms of matter and atoms act as oscillator which takes up frequency of incident light and undergoes forced oscillation and scatters light of same frequency.

A ray of light with wavelength 5000 nm travelling from a medium with refractive index (3/2) suffers partial reflection and refraction in a medium of refractive index (4/3) . Find wavelength of reflected and refracted ray.

If a ray of light in a denser medium strikes a rarer medium at an angle of incidence i, the angles of reflection and refraction are respectively, r and r' If the reflected and refraction rays are at right angles to each other, the critical angle for the given pair of media is

A ray of light from a denser medium strikes a rare medium as shown in figure. The reflected and refracted rays make an angle of 90^(@) with each other. The angles of reflection and refraction are r and r'. The critical angle would be

In Figure, a ray of light A incident from air suffers partial reflection and refraction at the boundary of water. (a) Complete the diagram showing (i) the reflected ray B and (ii) the refracted ray C. (b) How are the angles of incidence i and refraction r related ?