f If you wish to take a photo of yourself as you stand 3 m in front of a plane m
ID: 3891906 • Letter: F
Question
f
If you wish to take a photo of yourself as you stand 3 m in front of a plane mirror, for what distance should you focus the camera you are holding?* Describe the image of an object positioned 20 cm from a concave spherical mirror of radius 60cm* Real or virtual? Erect or Inverted? Distance from the mirror? Magnification? LIGHT FROM A SODIUM LAMP WITH WAVELENGTH = 589nm PASSES THROUGH A TANK OF GLYCERIN (n=1.47) 20m LONG IN TIME. IF IT TAKES t2 TO TRAVERSE THE SAME TANK WHEN FILLED WITH CARBON DISULFIDE (of index 1.63), DETERMINE THE DIFFERENCE t2-t1* A laser emits a 2-mm diameter of highly collimated light at a power level, or radiant flux, of 100mW. Neglecting any divergence of the beam, compute its irradiance.*Explanation / Answer
1)u=-3
v=3
Therefor focus=1/1/u+1/v=inf m
2)Virtual,Erect
1/v-1/20=1/-30
1/v=1/20-1/30=1/60
v=60
Behind the mirror
Magnification=60/20=3
Related Questions
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.