ICSE Class 9 Answered
(a) Define metre according to the old definition. (b) Define metre in terms of wavelength of light. (c) Why metre length in terms of wavelength of light is considered more accurate?
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(a) One ten-millionth part of the distance between the North Pole and the Earth's equator is called metre.
(b) One metre is 1,650,763.73 times the wavelength of a specified orange - red spectral line in the emission spectrum of Krypton-86.
(c) It is because the wavelength of light does not change with respect to space or time and is possible to define without any ambiguity.
(b) One metre is 1,650,763.73 times the wavelength of a specified orange - red spectral line in the emission spectrum of Krypton-86.
(c) It is because the wavelength of light does not change with respect to space or time and is possible to define without any ambiguity.
Answered by | 04 Jun, 2014, 03:23: PM
Concept Videos
-
Measurements and Experimentation
Measurements and Experimentation, Systems of Unit and Units in SI System -
Measurements and Experimentation
Measurements and Experimentation, Systems of Unit and Units in SI System -
Measurements and Experimentation
Measurements and Experimentation, Systems of Unit and Units in SI System
ICSE 9 - Physics
Asked by modhukuruvenkateshwarlu | 13 Apr, 2024, 03:03: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by anshumancharanpahadi | 13 May, 2023, 05:58: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by shovachoraria1 | 15 Apr, 2022, 01:35: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by nag38437 | 08 Jul, 2021, 10:04: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by kritikayadav829 | 07 Dec, 2020, 08:44: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by nonujain33 | 28 Jul, 2020, 02:46: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by punammishra061990 | 05 Jul, 2020, 09:14: AM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by nishasalo | 17 Jun, 2020, 12:11: PM
ANSWERED BY EXPERTICSE 9 - Physics
Asked by vedantjadhav08.9spicertl | 17 Jun, 2020, 11:03: AM
ANSWERED BY EXPERT
