Advertisements
Advertisements
Questions
What is total internal reflection?
Explain total internal reflection of light.
Advertisements
Solution
Total internal reflection is the phenomenon when a ray of light travelling in a denser medium is incident at the surface of a rarer medium such that the angle of incidence is greater than the critical angle for the pair of media, and the ray is totally reflected back into the denser medium.
APPEARS IN
RELATED QUESTIONS
Name the factors affecting the critical angle for the pair of media.
State two conditions necessary for total internal reflection to occur.
i) Observe the given figure and answer the following questions.
a) Identify and write the natural process shown in the figure.
b) List the phenomena which are observe in this process.
c) Redraw the diagram and show above phenomena in it.
Total internal reflection can take place only if ______.
Plot a graph between
Angle of incidence versus angle of reflection,
Plot a graph between
Sine of angle of incidence versus sine of angle of refraction,
Can light be ‘piped’ like sound in a doctor’s stethoscope?
What is meant by the term ‘critical angle’?
Complete the following diagram to show the path of the ray of a single colour in the diagram as if enters in and emerges out of the prism. Mark the angles wherever necessary. (Critical angle for glass = 42°).
Choose the correct option.
Angles of deviation for extreme colours are given for different prisms. Select the one having maximum dispersive power of its material.
Answer the following question.
Define the critical angle of incidence and obtain an expression for it.
Answer the following question.
Why is prism binoculars preferred over traditional binoculars? Describe its working in brief.
Critical angle of light passing from glass to air is maximum for ____________.
Which of the following statements about total internal reflection is true?
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.
A ray of light passes from vacuum into a medium of refractive index µ, the angle of incidence is found to be twice the angle of refraction. Then the angle of incidence is ______.
An endoscope uses optic fiber to transmit high resolution images of internal organs without loss of information. The principle of light that is used by the optic fiber is based on ______.
When a ray of light is refracted from one medium to another, then the wavelength changes from 6000 Å to 4000 Å. The critical angle for the interface will be ______.
