Advertisements
Advertisements
Question
Small air bubbles rising up a fish tank appear silvery when viewed from some particular angle is due to the ______.
Options
reflection
refraction
dispersion
total internal reflection
Advertisements
Solution
Small air bubbles rising up a fish tank appear silvery when viewed from some particular angle is due to the total internal reflection.
Explanation:
If the angle of incidence is larger than the critical angle, a light beam that is travelling from an optically denser to a rarer medium reflects back into the denser medium.
APPEARS IN
RELATED QUESTIONS
The diagram below shows a light source P embedded in a rectangular glass block ABCD of critical angle 42°. Complete the path of the ray PQ till it emerges out of the block. [Write necessary angles].
Plot a graph between
Angle of incidence versus angle of reflection,
Answer the following question.
Under what conditions are total internal reflection possible? Explain it with a suitable example.
Describe the construction and working of an optical fibre.
Answer the following question.
What are the advantages of optical fibre communication over electronic communication?
The entire light is reflected back into the denser medium is called ______.
The outer concentric shell in optic fiber is called ______.
A rectangular block of glass ABCD has a refractive index 1.6. A pin is placed midway on the face AB (Figure). When observed from the face AD, the pin shall ______.
- appear to be near A.
- appear to be near D.
- appear to be at the centre of AD.
- not be seen at all.
A given ray of light suffers minimum deviation in an equilateral prism P. Additional prism Q and R of identical shape and of the same material as P are now added as shown in the figure. The ray will now suffer ______.
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 ______.
