anonymous one year ago Will fan and medal!!! The frequency of a given region of the electromagnetic spectrum ranges from 4 × 10¹Ê to 7.5 × 10¹Ê Hz. The speed of light is 2.998 × 10§ m/s. Which waves are found in this region? microwaves infrared waves visible light ultraviolet reays

1. anonymous

@Teddyiswatshecallsme

2. anonymous

I know it's not microwaves, my teacher told me that much, but I'm at a loss for the rest.

3. anonymous

@MTALHAHASSAN2

4. MTALHAHASSAN2

Your exponential numbers are not clear! If you use the formula wavelength = speed of light / frequency and work out the wavelengths for both of your frequencies and compare with the approximate values given below, you will be able to answer this question. microwaves 1 x 10^-3m - 1m infrared 1 x 10^-3m - 1 x 10^-6m visible 1 x 10^-6m - 1 x 10^-7m UV 1 x 10^-8 - 1 x 10^-9m. Also, have a look at some of the electromagnetic images on the internet e.g yahoo.images! You will find this v.useful!

5. anonymous

I found this on google 5 different times and it wasn't helpful >.< I don;t understand how to do this and I can't make it anymore clear, it is a question from my quiz I copied it word for word, I have to answer using the information they gave me

6. MTALHAHASSAN2

oh ok

7. anonymous

So no ideas? Because I don't know what to do and if I don't pass my quiz it'll bring my whole grade down

8. MTALHAHASSAN2

9. anonymous

I think 12th grade, do you know someone who might know?

10. MTALHAHASSAN2

ok let me find anyone then

11. MTALHAHASSAN2

12. anonymous

You know that speed of light=(frequency)(wavelength) All those waves in the choices all have different wavelength. Frequency is in hertz Speed of light is 3.00 x 10^8 You were given frequency and speed of light. Now find the wavelength. If the wavelength has the same exponent in scientific notation to one of the waves, then it is that one.

13. anonymous

I still have no clue what it would be.. @Shalante

14. anonymous

What is number for speed of light?

15. anonymous

2.998 × 10§ m/s

16. anonymous

which is?

17. anonymous

How you would insert that variable in a scientific calculator?

18. anonymous

29.88?

19. anonymous

20. anonymous

I did I don;t know how to do that so it doesn't help me. I barely understood it

21. anonymous

All you do is read in my explanation to know the number for speed of light. If you cant do that, then I dont know. It is going to take a while. (A huge waste of time)

22. anonymous

Try to focus and reread it several times carefully

23. anonymous

Also, if you are asking for help, ask which part that you do not understand one at a time chronologically.

24. anonymous

The numbers them selves confuse me, I don't know how to set up my equation I guess you could say

25. anonymous

Ah, I see 3.00 x 10^8=$3.00\times10^8$ So what are the number for speed of light and frequency?

26. anonymous

Well when I multiplied what they they give me 300,000,000

27. anonymous

Hertz can be written as hz Did you pass Algebra 1? Since you are in chemistry and are that far, I assumed you have a good math background.

28. anonymous

Yes 300,000,000 is normal number for this question.

29. anonymous

....no I'm horrible at math.... like horribly horrible

30. anonymous

So from there where would we go?

31. anonymous

Speed of light=(frequency)(wavelength) Speed of light is in the unit m/s Wavelength is in the unit m Frequency is in hertz or hz Which of those are given in the problem. (meaning they have a number)

32. anonymous

Frequency?

33. anonymous

34. anonymous

Reread your problem several times carefully to get a better understanding of what I am saying

35. anonymous

Sorry my computer died yesterday and is 300,000,000 the wavelength?

36. anonymous

@ChiefArnav

37. anonymous

I'll stick to @Shalante's explanation.

38. anonymous

Well I never got to finish talking with him and now he's off line and I'm stuck

39. anonymous
40. anonymous

I'm still confused and my teacher is getting mad at me. Any way you could let me know what it is then explain how you got that?

41. anonymous

The ans is visible light...

42. anonymous

not 100% sure though

43. anonymous

Thank you, it was right. Could you show me how you got that?

44. anonymous

All I used was the given frequency.

45. anonymous

Each part of the spectrum has a name and frequency. Like Gamma rays they have a frequency of 3 time 10^19 hz

46. anonymous

Wavelength less than one nm if you wanted t know.

47. anonymous

to*

48. anonymous

Still in doubt,@WhatEven ?

49. anonymous

No I understand a little better now. Could you help with one more?