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2月3日 physicshello
firat thing iS THAT there is so any things to do this recent weeks and i have so many things to do .....so what should i say....any way...let me revise my work of physics first ok.....
what is the relationship between the angle of incidence and the angle of reflection....
the angle of incidence is equal to the angle of reflection....
what is normal......it is the line perpendiculaar to the surface of the mirror.
whar is ANGLE OF incidence .....it is the angle bewteen the incidence ray and the normal....
what is the angle of relection.....it is the angle between the reflection ray and the normal....
WHAT IS THE ADVENTAGE OF HAVING A PLANE NIRROR IN OPTICAL TESTING...
IT IS TO SEE THE LETTER IN THE MIRROR AND IT APPEAR FURTHER THATN THE ACTUALLY ARE AND WHEN A O\PLANE MIRROR IS USED SO THE LENGTH WOULD NOT BE LONG...
NAme to five charcterstic of the mirror.... it is laterally inverted...it have the same size as the object shown... it fall as far behind as the object is infront of the mirror...it have a virtual iumage...it is upright....
if a person stands in front of the plane mirror at a shorter distancee away...which of the following statement about the image form is wrong...
the statement is the height if the image depends on the object disatance.......this is wrong
while the image can be taller than the mirror is ture
the width of the image is the same as the width if the object
the image height depends on the onbject's height
an object is placed in 15cm in front of a plane mirror,if the mirror is moved at a speed of 10cm/s hoiw fasst dose the image move towars the object
the answer is 20 cm/s
why is this so....
this is bacause the 15*2=30 the total distance between the image and the object is 2 times of the realty..so that is why
sincec it is moving at a rate of 10 per s that mean s 10*2=20....ok you must remember...
when you are drawing a relextiong picture,,,you have to remember that you must draw your working line... oh you will be dead...ok rememmber,,,okokokokokokokok
why must the angle be 45* that is becasue that in such way the angle between the incidence and reflection is 90* and this would help the reay to hit straight to the person.....
ok...this is what it is in the reflection...
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