Question
Can light be ‘piped’ like sound in a doctor’s stethoscope?
✓
Answer
Yes, light can be piped from one end to the other with little loss by allowing it to enter one end of a rod of transparent material. The light will undergo total internal reflection at the wall of the rod and will proceed along its axis. This actually being achieved by using a bundle of glass fibers.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Name three factors on which the frequency of vibration of a stretched string depends.
How do bats avoid obstacles in their way, when in flight?
A simple machine enables us to lift a load of 10,000 N by the application of an effort of 500 N. However, when the point of application of the effort moves through 2.5 m, the load gets raised through 10 cm only. What are the values of the:
(i) M.A.
(ii) V.R. and
(iii) Efficiency of the machine?
(i) M.A.
(ii) V.R. and
(iii) Efficiency of the machine?
The diagram below shows three ways in which the string of an instrument can vibrate.
(i) Which of the above diagrams shows the fundamental note?
(ii) Which has the frequency 4 times that of the fundamental?
(iii) State the ratio between the frequency of the first and second.
(i) Which of the above diagrams shows the fundamental note?
(ii) Which has the frequency 4 times that of the fundamental?
(iii) State the ratio between the frequency of the first and second.
A concave lens forms an erect image of $1/3^{rd}$ size of the object which is placed at a distance $30\ cm$ in front of the lens. Find -
→- the position of image, and
- the focal length of the lens.
A mechanic can open a nut by applying a force of 200 N while using a lever handle of 50 cm length. How long handle is required if he wants to open it by applying a force of only 50 N?
A particular resistance wire has a resistance of 3 ohm per meter. Find :
The total resistance of three lengths of this wire each 1.5 m long, in parallel.
Calculate the frequency of yellow light of wavelength $550 nm$. The speed of light is $3 \times 10^8 m / s ^{-1}$
→An Electric bulb is marked 100 W, 230 V. What how long would this lamp take to consume one unit of electricity?
Draw a labelled diagram with necessary switch, regulator etc. to connect a bulb, a plug socket outlet and a fan with the mains. In what arrangement have you connected these to the mains?