module 3 and 4

Question 1

is one of known forms of radiant electromagnetic energy which travel in wave motion.

Answer 1

light

Question 2

is the number of waves passing in given point in one second.

Answer 2

frequency

Question 3

is the distance from crest(highest crest) to the wave of the next succeeding crest.

Answer 3

wavelength

Question 4

what are the two types of theory?

Answer 4

wavelength theory and quantum theory

Question 5

is the most pertinent, particularly in the design of lenses.

Answer 5

wavelength theory

Question 6

theorized that light might be made up of little bundles of energy named quanta.

Answer 6

quantum theory

Question 7

radiation having a wavelength between 01-30 nanometer or milli-microns.

Answer 7

X-ray

Question 8

radiation having a wavelength from 30 to 400 milli-microns.

Answer 8

ultra-violet rays

Question 9

rays having a wavelength of 400 to 700 milli-microns.

Answer 9

white light

Question 10

radiation having a wavelength of 700 to 1000 milli-microns.

Answer 10

infra-red rays

Question 11

RAT LAW

Answer 11

Reflected, Absorbed, and Transmitted

Question 12

it is the deflection or bouncing back of light when it hits a surface.

Answer 12

Reflection

Question 13

two types of reflection

Answer 13

Regular and Irregular

Question 14

happens when light hits a flat, smooth and shiny surface.

Answer 14

regular

Question 15

occurs when light hits a rough or uneven but glossy object.

Answer 15

irregular

Question 16

the bending of light when passing from one medium to another

Answer 16

refraction

Question 17

the bending of light when it hits a sharp edge opaque object

Answer 17

diffraction

Question 18

the nature of light that normally travels in straight line.

Answer 18

rectilinear

Question 19

color can be produce by interference of light waves in thin film like in a soap bubbles or a film of oil floating in water.

Answer 19

Interference

Question 20

the nature of light to be absorbed in the process of dark surface.

Answer 20

absorption.

Question 21

the character of light to be altered from its colorless into visible state.

Answer 21

filtration

Question 22

the process b which the vibration of light is confined to a definite plane, and the speed of light can be measured.

Answer 22

polarization

Question 23

these happen when molecules of the fluorescent material absorb energy at one wavelength and radiate it at another wavelength.

Answer 23

fluorescence

Question 24

two sources of light

Answer 24

natural and artificial

Question 25

coming from nature like the sun, moon, stars, other heavenly bodies, lightning. etc.

Answer 25

natural

Question 26

a lighting condition where object in open space cast a deep and uniform or distinct shadow.

Answer 26

bright sunlight

Question 27

object in open space cast a transparent shadow.

Answer 27

hazy sunlight

Question 28

objects in open space cast no shadow.

Answer 28

dull sunlight

Question 29

objects in an open space cast no shadow but objects at far distant are clearly visible.

Answer 29

cloudy bright

Question 30

objects in an open space cast no shadow and visibility of distant objects are already limited

Answer 30

cloudy dull

Question 31

those that can give continuous illumination

Answer 31

continuous radiation

Question 32

it gives a brief flash of light produced by a burning metallic wire (flash bulb) or an electrical discharge through a gas-filled tube (electronic flash)

Answer 32

short illumination

Question 33

what are the forensic light sources

Answer 33

ultraviolet lamp
laser
alternative light source

Question 34

it comes in variety of shape, size, and power

Answer 34

ultra violet lamp

Question 35

this was especially significant in locating dried biological stains.

Answer 35

laser

Question 36

it uses a variety of band pass filters to provide a high intensity beam of non-coherent light.

Answer 36

alternative light source