Discover the Answers to These Light and Electromagnetic Wave Questions!

[namvip6666]

Please! Help me.. I'm student.

Homework Statement

1. A light ray reflected from a flat mirror moves through an angle of 143* as the mirror is rotated. Through **what angle was the mirror rotated?

2. The speed of light in a material is 0,57c. what is the critical angle of a light ray at the interface between the material and a vacuum?

3.The electric field of plane electro magnetic wave is E=240V/m. At the same instant of time the magnetic field is...?

 

[tiny-tim]

welcome to pf!

hi namvip6666! welcome to pf!

show us what you've tried, and where you're stuck, and then we'll know how to help!

 

[namvip6666]

hi namvip6666! welcome to pf!

show us what you've tried, and where you're stuck, and then we'll know how to help!

Can you solve for me all of them. I don't kno*w how to do it.

 

[phinds]

Can you solve for me all of them. I don't kno*w how to do it.

That's not how this forum works. Read the forum rules and post the problem in the proper format, as tiny-tim said to. Once you've shown what you DO understand and what you DON'T understand, then we can help with what you don't understand.

We're NOT here to solve your problems, we're here to help you learn how to THINK about your problem so you can solve it yourself.

 

[namvip6666]

That's not how this forum works. Read the forum rules and post the problem in the proper format, as tiny-tim said to. Once you've shown what you DO understand and what you DON'T understand, then we can help with what you don't understand.

We're NOT here to solve your problems, we're here to help you learn how to THINK about your problem so you can solve it yourself.

So, can you tell me the formula to calculate it?

 

[phinds]

So, can you tell me the formula to calculate it?

Read the forum rules and post the problem in the proper format as I said in the first place

 

[tiny-tim]

So, can you tell me the formula to calculate it?

no, namvip6666, if you're going to learn, you tell us the formulas

1 is about reflection of light, 2 is about refraction of light, 3 is about E and B of a plane wave …

tell us what equations you know about these three situations …

if you don't know any, go back to your lecture notes or your book, and find some

Please! Help me.. I'm student.

so study!

 

[Saitama]

Namvip6666, if you seek help here on the physics forums in your homework, you need to show some of your attempts at the solution. If you just come here and plead that "i am a student, please help", "Please give me the solution to it" no one is going to help you. Moreover you should first check the rules before asking help in Homework section.

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