मराठी

Name the Scientist Who Discovered - Physics

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प्रश्न

Name the scientist who discovered radio waves

एक शब्द/वाक्यांश उत्तर

उत्तर

 Marconi

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 2: Light - Exercise 2.3 ii [पृष्ठ ११०]

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फ्रँक Physics - Part 2 [English] Class 10 ICSE
पाठ 2 Light
Exercise 2.3 ii | Q 6.4 | पृष्ठ ११०

संबंधित प्रश्‍न

The wavelengths for the light of red and blue colours are roughly 7.8 × `10^7` m and 4.8 × `10^7` m respectively.
(a) Which colour has the greater speed in vacuum?
(b) Which colour has the greater speed in glass?


Give the range of wavelength of the electromagnetic waves visible to us.


The electric current in an X-ray tube (from the target to the filament) operating at 40 kV is 10 mA. Assume that on an average, 1% of the total kinetic energy of the electron hitting hte target are converted into X-rays.
(a) What is the total power emitted as X-rays and (b) how much heat is produced in the target every second?


The Kα and Kβ X-rays of molybdenum have wavelengths 0.71 A and 0.63 A respectively. Find the wavelength of Lα X-ray of molybdenum.

(Use Planck constant h = 6.63 × 10-34 Js= 4.14 × 10-15 eVs, speed of light c = 3 × 108 m/s.)


Two waves A and B have wavelength 0.01 Å and 9000 Å respectively.

Name the two waves. compare the speeds of these waves when they travel in vacuum.


Name the radiation of the electromagnetic spectrum which is used for the following:

To photograph internal parts of the human body and Give the frequency range


For television broadcasting, the frequency employed is normally


The electric field intensity produced by the radiations coming from 100 W bulb at a 3 m distance is E. The electric field intensity produced by the radiations coming from 50 W bulb at the same distance is ______.


Below is an incomplete table showing the arrangement of electromagnetic spectrum in the increasing order of their wavelength. Complete the table:

Gamma ray X - ray UV rays Visible rays Infrared A Radio waves
  1. Identify the radiation A.
  2. Name the radiation used to detect fracture in bones.
  3. Name one property common to both A and Radio waves.

Name two electromagnetic waves of wavelength smaller than that of violet light.


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