UrbanPro

Find the best tutors and institutes for Class 12 Tuition

Find Best Class 12 Tuition

Please select a Category.

Please select a Locality.

No matching category found.

No matching Locality found.

Outside India?

Search for topics

Why is only the speed of light constant in all frames of reference?

Asked by Last Modified  

CBSE/Class 11/Science/Physics

Follow 15
Answer

60 Answers

Please enter your answer

IITJEE Mains and Advanced PHYSICS 8 years experience.

It is a fundamental postulate of Einstein's particular theory of relativity. We found no evidence opposing this until now. It is confirmed later in many experiments.
Comments

"Mistakes are your best Teacher".

Speed of light is not constant in every medium. In comparison, the velocity of light is very high, so we neglect the other velocity.
Comments

IIT Guwahati graduate in Physics. 5 years of experience. Also doing Research in Physics.

To answer this question, one needs to answer, what do mean by why? What's the intention to ask. One can ask why solid is solid, or liquid is liquid. For light, it is made up of photons, which has zero rest mass. At the time of origin of the universe, photons were there. Somehow, the world has a cosmic...
read more

To answer this question, one needs to answer, what do mean by why? What's the intention to ask. One can ask why solid is solid, or liquid is liquid. For light, it is made up of photons, which has zero rest mass. At the time of origin of the universe, photons were there.

Somehow, the world has a cosmic speed limit, and any particle which can have that limit is massless. So, any object which has mass zero or says particle moves with the speed of light.

Another example is a graviton or gravitational waves. So, light happens to be one of the particles which mass is zero. And in every inertial frame, this cosmic limit must be the same. It can't be different. Note, I have said any inertial frame. I am not talking about the non-inertial frame.

read less
Comments

Physics student and teacher with 4 years of experience

According to the later well defined 2nd postulate of the particular theory of relativity (by Sir Albert Einstein), speed of light is constant in every inertial frame of reference. You will come across it more vividly once you learn about the Lorentz Transformations and Minkowski Flat space. But for the...
read more

According to the later well defined 2nd postulate of the particular theory of relativity (by Sir Albert Einstein), speed of light is constant in every inertial frame of reference. You will come across it more vividly once you learn about the Lorentz Transformations and Minkowski Flat space. But for the time being, you get the idea of it.

read less
Comments

Best teacher for math and science for 9 th and 10th class and 12 th math

Light does not travel the same distance in all frames but a proportional distance based upon the energy of the device used to measure its distance. It's measure a proportional distance, not the same distance; the speed of light appears to constant regardless of velocity or frames.
Comments

lecturer have 7 years of experience in teaching industry and my education background is mathematics

The only thing that affects the speed of light is the refractive index of the medium through which it moves, and for space, this number is 1.000000 and gives you the maximum possible speed of light.
Comments

3 × 10^8 m/s whatever might be the speed of object irrespective of the frame. Eg.: You are standing and looking at a ray of light, as you are stationary w.r.t. The surroundings you find the speed of light is 3 × 10^8m/s. Now if an alien from its spaceship looks at you, you are moving as the...
read more

3 × 10^8 m/s whatever might be the speed of object irrespective of the frame. Eg.: You are standing and looking at a ray of light, as you are stationary w.r.t. The surroundings you find the speed of light is 3 × 10^8m/s. Now if an alien from its spaceship looks at you, you are moving as the earth is revolving and rotating. So you have a speed due to that frame, but still when that alien looks at same light ray. The speed is always the same. Now alien tries to catch the light ray and boost the engine of its spaceship, and still, it sees the same the light ray is still going with the same speed, the person standing on the ground looks at this eye-catching moment, and he still considers that speed of light to be constant.

read less
Comments

Teaching experience of 17 years.

The first thing you need to understand is, what is the speed of light. In Newton's world of physics, speed of signal was referred to be the speed of light, but in those times space and time were discrete quantities. Because of that, the speed of signal was assumed to be an undetermined quantity. Later,...
read more

The first thing you need to understand is, what is the speed of light. In Newton's world of physics, speed of signal was referred to be the speed of light, but in those times space and time were discrete quantities. Because of that, the speed of signal was assumed to be an undetermined quantity. Later, Einstein came into the picture and intricated the idea of space and time, and by the Michelson Morley Experiment, speed of light was found to be constant. In that experiment, Earth's velocity was tried to measure relative to the medium aether as proposed by Maxwell.

Although Maxwell defined the speed of propagation of EM waves to be 'c', he thought that it is relative to the non-existing medium aether. The idea of aether dates back to times of Christian Huygens.

read less
Comments

An electronics graduate and have been teaching for last 4 years

Light doesn't need any medium to travel. It can easily travel in the vacuum. So light travels with a constant speed in all mediums.
Comments

Speed of light is constant in all mediums: Reasons: Light belongs to Electromagnetic portion of the wave spectrum. Light does not require any material medium for their propagation. Hence they are also called Non-mechanical Waves. Therefore light is not affected by any kind of variations of air particles....
read more

Speed of light is constant in all mediums:

Reasons: Light belongs to Electromagnetic portion of the wave spectrum. Light does not require any material medium for their propagation. Hence they are also called Non-mechanical Waves. Therefore light is not affected by any kind of variations of air particles. Therefore light speed remains constant in all mediums.

read less
Comments

View 58 more Answers

Related Lessons

Frame of Reference
Frame of reference:When the position of a particle in space changes with time, it is said to be in motion. To describe motion, a frame of reference is needed first and foremost. The set of spatial coordinates...

Deepsikha Das | 02 Jun

2 0
0

How to Solve Numericals in Physics?
Are you scared of numerical? Do you think you don't understand them? If yes, then read ahead. See, it might be any exam, but numerical won't leave your back. So let's talk about common problems and their...

Understanding Conservative and Non Conservative Forces
While teaching my students, I found them to fumble in this topic, so I am writing this lesson to tell you all in simple terms what the topic is:Consider two cases in both cases; a block moves from A to...

Recommended Articles

Radhe Shyam is a highly skilled accounts and finance trainer with 8 years of experience in teaching. Accounting is challenging for many students and that s where Radhe Shyam s expertise comes into play. He helps his students not only in understanding the subject but also advises them on how to overcome the fear of accounts...

Read full article >

Mohammad Wazid is a certified professional tutor for class 11 students. He has 6 years of teaching experience which he couples with an energetic attitude and a vision of making any subject easy for the students. Over the years he has developed skills with a capability of understanding the requirements of the students. This...

Read full article >

Raghunandan is a passionate teacher with a decade of teaching experience. Being a skilled trainer with extensive knowledge, he provides high-quality BTech, Class 10 and Class 12 tuition classes. His methods of teaching with real-time examples makes difficult topics simple to understand. He explains every concept in-detail...

Read full article >

Urmila is a passionate teacher with over 8 years of experience in teaching. She is currently pursuing her Ph. D. She provides classes for Class 11, Class 12, MBBS and Medical tuition. Urmila began her career in teaching long before she became a teacher. She used to provide classes for foreign national students in her college...

Read full article >

Looking for Class 12 Tuition ?

Find best Class 12 Tuition in your locality on UrbanPro.

Are you a Tutor or Training Institute?

Join UrbanPro Today to find students near you
X

Looking for Class 12 Tuition Classes?

Find best tutors for Class 12 Tuition Classes by posting a requirement.

  • Post a learning requirement
  • Get customized responses
  • Compare and select the best

Looking for Class 12 Tuition Classes?

Find best Class 12 Tuition Classes in your locality on UrbanPro

Post your learning requirement

UrbanPro.com is India's largest network of most trusted tutors and institutes. Over 55 lakh students rely on UrbanPro.com, to fulfill their learning requirements across 1,000+ categories. Using UrbanPro.com, parents, and students can compare multiple Tutors and Institutes and choose the one that best suits their requirements. More than 7.5 lakh verified Tutors and Institutes are helping millions of students every day and growing their tutoring business on UrbanPro.com. Whether you are looking for a tutor to learn mathematics, a German language trainer to brush up your German language skills or an institute to upgrade your IT skills, we have got the best selection of Tutors and Training Institutes for you. Read more