Question

Which of the following is NOT true for electromagnetic waves? (a) they transport energy (b) they transport momentum (c) they consist of changing electric and magnetic fields (d) they travel at different speeds in vacuum, depending on their frequency e) they can be reflected We perceive frequency for sound wave as pitch. What do we perceive frequency for light waves? (a) Color (b) Brightness (c) opacity (d) Shininess Unpolarized light passes through a single polarizer with an intensity of 10.00 mW/m^2. What is the intensity of the light upon exiting the polarizer? (a) 2.50 mW/m^2 (b) 5.00 mW/m^2 (c) 7.50 mW/m^2 (d) 10.00 mW/m^2 Which property of a light wave does not change as the wave passes from one transparent medium to another: (a) Frequency (b) Wavelength (c) Phase velocity (d) Amplitude Considering what you would observe on a nice day, which color of light do you think scatters most in the atmosphere? (a) Blue (b) Red (c) Yellow (d) White (all colors scatter the same) The phenomenon that makes fiber optic signal transmission possible is physical (a) Dispersion (b) Polarization by reflection (c) Small angle refraction (d) Total internal reflection

Answer 1

Properties of electro magnetic waves. They have electric field and magnetic field they offer all phenomenon of light-reflection, diffraction etc, they travel with speed of light they energy as well as momentum ans- Hence, (d) is correct option