Advertisements
Advertisements
Question
(i) What is the relation between the refractive index of water with respect to air `("_aμ_\text(w))` and the refractive index of air with respect to water `("_\text(w)μ_ a)` .
(ii) If the refractive index of water with respect to air `("_aμ_\text(w))` is`5/3`. Calculate the refractive index of air with respect to water `("_\text(w)μ_ a)` .
Advertisements
Solution
(i) `"_a μ_\text(w) =(mu_\text(w))/(mu_a)`
` "_\text(w) μ_a = (mu_a)/(mu_\text(w) `
`∴ "_a μ_\text(w) `= `1/ ("_\text(w) mu_a)`
(ii) ` "_a μ_\text(w) = 5/ 3`
` "_\text(w) mu _a = 3/5 `
APPEARS IN
RELATED QUESTIONS
When a ray of light travels from air to glass slab and strikes the surface of separation at 90°, then it …………….
(a) bends towards normal
(b) bends away from normal
(c) passes unbent
(d) passes in zigzag way
Write a short note on dispersion of light.
The speed of light in glass is 2 × 105 km/s. What is the refractive index of glass?
A ray of light is passing from a transparent medium 1 to another transparent medium 2 (i) Speed up (ii) slows down. In each case, state whether the refractive index of medium 2 is equal to, less than or greater than the refractive index of medium 1.
Fig shows a lens as a combination of a glass block and two prisms.
(i) Name the lens formed by the combination.
(ii) what is the XX' called?
(iii) Complete the ray diagram and show the path of the incident ray PQ after passing through the lens.
(iv) The final emergent ray will either meet XX' at a point or appear to come from a point on XX'. what is the point called?
Draw a diagram to show the splitting of white light into its constituent colours.
Draw ray of light bending towards the normal while passing from air to glass. Label your diagrams.
Light passes through a rectangular glass slab and through a triangular glass prism. In what way does the direction of the two emergent beams differ and why?
The diagram shows the path of a ray of light through a rectangular glass block placed in a liquid of uniform density.
(a) Does the light speed up or slow down in the glass,
(b) Give the reason for your answer.
Consider these indices of refraction: glass: 1.52; air: 1.0003; water: 1.333. Based on the refractive indices of three materials, arrange the speed of light through them in decreasing order.
