Question

What is the energy of a photon of light having a wavelength of 4.5 x 10-7 meters? (Planck’s constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108 m/s)

2.9817 x 10-40 joules

4.4143 x 10-19 joules

6.6745 x 10-26 joules second

9.9456 x 10-49 joules

19.864 x 10-26 joules/second

Answer 1

@Missiey im sorry i know you helped me a lot yesterday but you think you could help me one or two more times xD

Answer 2

yes give me a sec

Answer 3

thank you so much!

Answer 4

6.6745 x 10-26 joules secon
is what i got

Answer 5

u have another one

Answer 6

yes,
The frequency of a given region of the electromagnetic spectrum is more than 3 x 1019 HZ. Note that the speed of light is 2.998 x 108 m/s. Which waves are found in this region?

gamma rays

visible light

microwaves

radio waves

x–rays

Answer 7

my guess was gamma rays

Answer 8

The wavelength is L=c/f = 2.998*10^8/3*10^19 = ~10^-11m = 0.01nm
That is border-line between gamma and x-ray, but if you'd have to choose just one answer based on 10^-11m wavelength as threshold it would be gamma as the result of the calculation is slightly below 10^-11
2.998*10^8/3*10^19 = 0.9993*10^-11

in short yes gamma ray

Answer 9

sorry wanted to atleast explain alittle

Answer 10

thats okay lol explaining is good :) thanks

Answer 11

no prob

Answer 12

anymore

Answer 13

maybe one i have to answer this question i know this one(:

Answer 14

In what form does all radiant energy travel through space?

In the form of light.

In the form of electromagnetic radiation.

In the form of accelerating protons.

In the form of heat energy.

In the form of accelerating neutrons

Answer 15

Radiant belongs to the electromagnetic force and travels through the electromagnetic field.

Answer 16

so B

Answer 17

yes

Answer 18

thank you so much for all your help!

Answer 19

anytime