word problem about light..help!?
826958
First calculate how many seconds there are in a year.\n\n60 * 60 *24 * 365 = 31535000 seconds in a year.\n\nThen multiply that by how far light travels in one second (it's easier to use a scientific calculator and scientific notation.\n\n1.86 x 10 ^ 5  * 31535000 = about 5.86 X 10^12 miles\nThat would be 5 with 12 number places trailing it so....\n5,860,000,000,000 is pretty darn close to 5.88 trillion miles.  Now I know my calculation is slightly off.  Your teacher was probably looking for a leap year in the equation.  When multiplying by the # of days in a year, use 365.25 instead of 365.
41822
Simple one will be \nSunlight + Carbon dioxide (CO2) + Water (H2O)--> Glucose (C6H12O6) + Oxygen (O2).\nor \n6CO2 +12 H2O (light energy and chlorophyll) ---> C6H12O6 + 6O2\nRemember to use subscript whenever necessary.
425318
Light is photons and photons have mass. You missed the point of the equation entirely. Reverse it: m=E/c^2. Solve the equation for mass. It proves that the photon not only has mass but the exact mass of the photon in question.
406703
the speed of light is c=3*10 at the 8-th power  m/s\ndark means 0 light
926057
The above solution has to be repeated again on the inside of \nthe prism just before the light comes out the other side.\n\nThe light gets refracted twice, one on contact with the prism, and\nagain before exiting the prism.  So you have to calculate the\nangle of incidence on the inside of the prism given the apex\nangle of 46 and the refracted angle of 26.36. A geometry\nproblem. Then repeat above calculation.
511965
Since you need simple and portable, how about starting with something that uses light and prisms to create the spectrum? \nFrom there, you could go to show how rainbows are created ( where the light must be, what the sequence of the rainbow spectrum is) or compare how light colors mix compared to how m=paint colors mix.  I don't know if that is appropriate for the 10 th grade.  But working with light and prisms is always fun.\nmagnetism is always fun, too.
161669
You've got it right! "c" is the usual way the speed of light is notated. .37 c would be 37% of the speed of light.
737785
I'll let you do the calculation, but the equation you need is:\n\nE = hc/lambda \n\nwhere h is Planck's constant, c is the speed of light in m/s and lambda is the wavelength of the light (in meters). You can find the rest of the numbers in your text book, I'm sure...
1033843
e=mc^2\n\ne (energy)=m (mass) times c (the speed of light) squared
575076
Tricky....\nI assume that it will be impossible to see the light inside the ball. When you "see" things is because the light bounces on the surface of objects into your eyes... As the light in this hypothetical ball cannot get out of the ball and towards your eyes, you'll see just a dark shiny ball... (i guess)
1148279
light travels at 3 x 10^8 m/s\n\nsound travels at 330 mph \n\nso it takes lot of time for sound to reach us, than light..even though both are produced at the same time...
883279
light has constant speed... a big zero acceleration....\nlight does not have mass so no inertia... but amazingly has momentum...........
812905
WL = c / frequency, where c is the speed of light.\n\nWL = 3 x 10^8  (m/s) / 6 x 10^14 (1/s) = 5 x 10^(-7) m = 500 nm\n\nThe result is compatible with green light (577 - 492 nm).
976652
1 km from p the light is √10 km away\n\nusing v = rω and ω = 4*2π radians/minute = 8π*60 = 480π rad/hr\nv = √10 * 480π km per hour at right angles to the radius\nThe angle between the velocity vector and the beach\n= the angle between the line from p to the lighthouse and the position 1 km up the beach to the lighthouse\n\nSo V along the beach = √10 * 480π * cos (angle)\n= √10 * 480π * 3/√10\n= 1440π km/h\n≈ 4524 km/h (no wonder they flash so fast!!! LOL)
785037
You must to review the diagram... note that the light escape in a second reflection, no in the first reflection.
1103364
each magnitude corresponds to a ratio of 10^(-.2), so you want to multiply the (-.2) by (1.9) and look at 10 to that power. This gives the  fraction of photons that make the trip.\n\nHomework and repeat question.
737137
Light is a very odd thing to try and understand.  It behaves as a wave and as a stream of particles...we call this a dual nature.  You just have to accept it, really.  Light is like nothing else for it has no mass and behaves in two different ways.