QUESTION 27 A candle is in front of a convex mirror 20 7cm from it. The focall l

Question

QUESTION 27 A candle is in front of a convex mirror 20 7cm from it. The focall length of the mirror is 17.7. What is the distance between the image and the mirror in cm? Do not use the unit in your btaswer ad note that the focal point of a convex miro s itual lf your answenegative use the negative sig when you sultmit the answer but don't include the unit) QUESTION 28 An object is in front of a converging lens 59. 9cm from it The focal length of the lens is 21 1cm. What is the distance between the image and the mirror, measured in em? (If your answer is negative, use the negative sign when you enter your answer, but do not include units in your answer) QUESTION 29 An object is 3.77m from a plane mirror What is the distance between the object and its virtual image in the miror, measured in meters? Do not include the units in your answer QUESTION 30 s the surface of a miror If the angle made between the ray and the surface of the mirror is 34 20 what is the angle of incidence? Do not the degree sign in your answer

Explanation / Answer

Question27:

Focal point is virtual, so f = -17.7

u = 20.7 cm

v = ?

lense formula -

1 / u + 1 / v = 1 / f

put the values -

1 / 20.7 + 1 / v = - 1/17.7

=> 1 / v = -1/17.7 - 1/20.7 = -0.1048

=> v = -9.54 ( I am not including the units as per the instructions in the problem).

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