a beam of light converges toa point S. a mirror is placed in front of the screen at a distance of 10cm from the screen. it is found that the beam now converges at a point 20cm in front of the mirror. find the focal lenght.i did not receive any answer to this question.
a beam of light converges toa point S. a mirror is placed in front of the screen at a distance of 10cm from the screen. it is found that the beam now converges at a point 20cm in front of the mirror. find the focal lenght.
i did not receive any answer to this question.
trisha , 7 Years ago
Grade 10
