Advertisements
Advertisements
प्रश्न
A ray of light enters a glass slab ABDC as shown in figure and strikes at the centre O of the circular part AC of the slab. The critical angle of glass is 42°. Complete the path of the ray till it emerges out from the slab. Mark the angles in the diagram wherever necessary.
Advertisements
उत्तर
Inside the slab at K ∠i = 48° = ∠r
KL incident ray strikes at L, ∠i = 42° = ∠C and emergent ray LM is parallel to BD, i.e. ∠r = 90°
APPEARS IN
संबंधित प्रश्न
A ray of light passes from water to air. How does the speed of light change?
How is the refractive index of a medium related to the speed of light in it?
How is the angle of emergence related to the angle of incidence when prism is in the position of minimum deviation? Illustrate your answer with help of a labelled diagram using an equilateral prism?
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 line XX' called?
(iii) Complete the path of the incident ray PQ after passing through the lens.
(iv) The final emergent ray either meets XX' at a point or appears to come from a point on XX'. Label it as F, What is this point called?
Draw a diagram to show the splitting of white light into its constituent colours.
How does the deviation produced by a prism depend on the wavelength of incident light?
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?
A glass block is having refractive index 3/2, the light ray is incident at an angle 45°. Find the sine of the angle of, refraction inside the glass block.
