Spectroscopy is the study of the interaction between electromagnetic radiation and matter. When sunlight passes through a prism, it is separated into the visible spectrum of colors as well as invisible ultraviolet and infrared radiation. The ozone layer protects the Earth from harmful ultraviolet radiation by absorbing most UV radiation coming from the sun. Black bodies are ideal objects that absorb all types of radiation coming from a source, making the Earth behave like a black body by absorbing all incoming radiation.

2. s

5. Spectroscopy is the study of the
interaction between andmatter
electromagnetic radiations.
P

6. When
sun light pass through the prism it bend.
And seven colurs shown
Actually it bend in to three parts one is visible and other two are
invisible
Visible spectrum is called light (of different colours)
Invisible spectrum are uv and infrared
Radiations.
F

7. Sun light
UV-radiations Infred radiation
Visible
light
Continous
Spectrum
UV-A UV-B
UV-C
X

8. Light emerge propagation in the
same direction is known as…….
Energy light is absorb in the volume of Material is known as…..
Light emerge in to the different direction.is
known as….
jdg

9. UV is an electromagnetic radiation with a wavelength from 100nm to the
40nm, shorter than the visible light but longer then x-rays
Uv radiations is present in sunlight constituting about 10% of the total
output if the sun. It’s also produce by electric arcs and specialized light,
such mercury vapor’s lamps, tanning lamps and black light.

10. The Block 77% of the Sun UV,atmosphere
K

11. Ozone layer is the layer which protect
the earth from harmful radiations.
Ozone layer is form in the mid of stratosphere.
O2 + O O3

12. Uv radiations are dangerous for us:-
It cause skin cancer.
It change the life cycle.
Three benefits of UV radiations are
Production of vitamin D, improment in
mood, and increase energy.

13. The colour that we see actually it is due to reflection of colour light
e.g. Reflect the
blue colour
What a
blue
colour
All colours
absorve
expect
Blue
T

14. Why our eye do not see the Uv
radiations and infared radiations?
Because our
eye see the light which have the wavelength of
400nm to 700nm.
K

15. The body which is
Best emitter or as well as best absorber.
Can we says that earth is a black body?
Yes.
Because black body are ideal body.
Earth absorb all types of radiations coming from source.
In this way we says that earth is a black body.
U
What is black body?

16. Do you know?
Black colour absorb more heat than the silver
colour
Because.
Black colour absorb all types of radiations
But
Silver colour refleact back more radiations
Absorbe less. M

17. c

18. e

20. Radiations:-
Radiations is the emission or
of energy in the form of waves.
Radiations are dangerous.
transmission
z

21. Transmitted
light:-
Light emerge
propagation in the same direction is known
as…….
h

22. Matter:-
There are four states of matter
v

23. Electromagnetic radiations:-
Sunlight is a
portion of electromagnetic radiation give off by the sun, in
particular infrared, visible and ultraviolet light.
b

24. When light pass through the prism it bend in to seven
colures which have different wavelength,
frequency&photon energy
k

25. Wavelength
Photon energy
0
100
200
300
400
500
600
700
800
Red Orange Yellow Green Blue Voliet
Wavelength 750 620 590 570 495 390
Frequency 400 480 510 526 606 668
Photon energy 1.65 200 210 217 250 275
750
620
590
570
495
390
400
480
510 526
606
668
1.65
200 210 217
250
275
AxisTitle
AxisTitle
Axis Title
Chart Title
Wavelength Frequency Photon energy
Colour Wavelength Frequency Photon
Energy
Violet 380-450nm 668-789THz 275-326eV
Blue 450-495nm 606-668THz 250-275eV
Green 495-570nm 526-606THz 217-250eV
Yellow 570-590nm 508-526THz 210-217eV
Orange 590-620nm 484-526THz 200-210eV
Red 620-750nm 400-484THz 1.65-200eV

26. Continuous spectrum non stop emition
or energy
f

27. Transmition
Scattered
e

28. Earth
UV-C
UV-B
UV-A
Ozone
k

29. Black
body
t

30. Paper Wood
Wall
Alpha
Beta
Gama