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प्रश्न
Which colour of light has a higher critical angle? Red light or green light.
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उत्तर
The critical angle for 'Red' colour is higher than that of green light.
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संबंधित प्रश्न
The figure shows a ray of light falling normally on the face AB of an equilateral glass prism having refractive index`3/2`, placed in water of refractive index `4/3`.Will this ray suffer total internal reflection on striking the face AC? Justify your answer.
What is total internal reflection?
Plot a graph between
Angle of incidence versus angle of refraction.
State two advantages of using a right-angle prism as a reflector, rather than a plane mirror.
Observe the given figure and write appropriate phenomenon of light in the box.
The critical angle is defined as the angle of incidence at which the total internal reflection starts to occur.
Optical Fibres are based on the phenomenon of dispersion.
What is the phenomenon used in optical fiber? Explain.
A jar of height h is filled with a transparent liquid of refractive index µ (Figure). At the centre of the jar on the bottom surface is a dot. Find the minimum diameter of a disc, such that when placed on the top surface symmetrically about the centre, the dot is invisible.
Observe the given figure of the raindrop and answer the following questions:
- Label A and B of the given diagram. Why colour will deviate most.
- Name the phenomenon shown in label C.
