Advertisements
Advertisements
प्रश्न
How does a ray of light bend when it travels from rarer to denser medium
Advertisements
उत्तर
When a ray of light travels from rarer to the denser medium it bends towards the normal.
संबंधित प्रश्न
State the conditions required for total internal reflection of light to take place
Which colour of light has a higher critical angle? Red light or green light.
Swarali has got the following observations while doing an experiment. Answer her questions with the help of observations.
Swarali observed that the light bent away from the normal, while travelling from dense medium to rarer medium. When Swarali increased the values of angle of incidence (i), the values of angle of refraction (r) went on increasing. But at a certain angle of incidence, the light rays returned into the dense medium.
So, Swarali has some questions. Answer them –
a) Name this certain value of ‘i ’. What is the value of ‘r’ at that time ?
b) Name this process of returning of light in dense medium. Explain the process.
Plot a graph between
Sine of angle of incidence versus sine of angle of refraction,
How is the critical angle of a material related to its refractive index?
Choose the correct option.
Select the WRONG statement.
Answer the following question.
What are the advantages of optical fibre communication over electronic communication?
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.
