Assertion : Television signals are received through sky-wave propagation. Reason : The…
Physics · NEET · NTA Exams — Optics
Assertion : Television signals are received through sky-wave propagation.
Reason : The ionosphere reflects electromagnetic waves of frequencies greater than a certain critical frequency.
Reason : The ionosphere reflects electromagnetic waves of frequencies greater than a certain critical frequency.
- If both assertion and reason are true and reason is the correct explanation of assertion.
- If both assertion and reason are true but reason is not the correct explanation of assertion.
- If assertion is true but reason is false.
- If both assertion and reason are false.
Answer
(B) If both assertion and reason are true but reason is not the correct explanation of assertion.
Sign up free on Edukali to view the step-by-step worked solution and practice thousands of similar questions.
Related practice questions
- A mixture of light, consisting of wavelength 590 nm and an unknown wavelength, illuminates Young's double…
- A single slit of width d is illuminated by violet light of wavelength 400 nm and the width of the diffraction…
- Time taken by sunlight to pass through a window of thickness 4 mm, whose refractive index is 3 2 , is
- A bird is flying in air at a height of X cm. It observes a fish vertically below it, at a depth of Y cm from…
- A linearly polarised electromagnetic wave given as E = E 0 i cos( kz – ω t ) is incident normally on a…
- The coherence of two light sources means that the light waves emitted have:
- The distance between an object and a divergent lens is m times the focal length of the lens. The linear…
- Which of the following is correct expression for velocity of light ?