When a light beam approaches you, its frequency is greater and its wavelength less. Does this contradict the postulate that the speed of light cannot change? Defend your answer.
Solution 10E Step 1 When light is approaching me, the light is moving towards the higher gravitational field, that is the gravitational potential is decreasing (since the gravitational field is attracting). According to the general theory of relativity, if light travels towards the higher gravitational potential, the energy of the light will decrease. Now, in this case, the light is actually travelling towards the lower potential energy. Hence the energy of light will increase. Since the speed of the light remains same, the frequency of the light will increase and hence the wavelength of the light will decrease. Hence it is clear that the phenomenon does not violate the postulate of the special theory of relativity, that the speed of the light is a universal constant.
Textbook: Conceptual Physics
Author: Paul G. Hewitt
The full step-by-step solution to problem: 10E from chapter: 35 was answered by , our top Physics solution expert on 04/03/17, 08:01AM. Conceptual Physics was written by and is associated to the ISBN: 9780321909107. Since the solution to 10E from 35 chapter was answered, more than 283 students have viewed the full step-by-step answer. The answer to “When a light beam approaches you, its frequency is greater and its wavelength less. Does this contradict the postulate that the speed of light cannot change? Defend your answer.” is broken down into a number of easy to follow steps, and 29 words. This textbook survival guide was created for the textbook: Conceptual Physics, edition: 12. This full solution covers the following key subjects: its, light, frequency, cannot, change. This expansive textbook survival guide covers 45 chapters, and 4650 solutions.