Speed of light, radio waves and microwaves in vacuum is:
Correct answer: D. 3 x 10^8 ms-1
- A. 3 x 10^5 ms-1
- B. 3 x 10^3 ms-1
- C. 3 x 10^6 ms-1
- D. 3 x 10^8 ms-1
Explanation
Explanation:The speed of light, radio waves, and microwaves in the vaccum is the same, which is approximately 3 × 108 m/s. This speed is denoted by the symbol "c" and is considered a fundamental constant in physics. It is also the maximum speed at which any object or information can travel in the universe according to the theory of relativity.
This question appeared on the UHS MDCAT 2009 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Electromagnetic Waves
Electromagnetic waves consist of mutually perpendicular, oscillating electric and magnetic fields that also remain perpendicular to the direction of propagation. They travel through vacuum at the speed of light and include radio waves, microwaves, infrared, visible, ultraviolet, X-rays and gamma rays. Unlike mechanical waves, they do not require a material medium.
Practise Alternating Current
592 free Alternating Current MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Physics questions like this
Physics is on 16 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Electromagnetic Waves questions
Which radiation is used in greenhouse effect?
X-rays can be deflected by:
The waves which do not require any medium for their propagation are called:
In a microwave oven, the wave produced has a wavelength of 12 cm at a frequency of:
Which type of electromagnetic radiation has the longest wavelength?
The radio waves of constant amplitude are called: