Asked by sophie
A 5.0-cm real object is placed at a distance of 30.0 cm from a concave mirror of focal length 10.0 cm. Find the location of the image.
A. 6 cm
B. 10 cm
C. 15 cm
D. 60 cm
Is it B. 10 cm?
Which of the following objects can set fire to a piece of paper in the presence of sunlight?
A. Double concave lens
B. Convex lens
C. Convex mirror
D. Concave lens
Is it B?
A. 6 cm
B. 10 cm
C. 15 cm
D. 60 cm
Is it B. 10 cm?
Which of the following objects can set fire to a piece of paper in the presence of sunlight?
A. Double concave lens
B. Convex lens
C. Convex mirror
D. Concave lens
Is it B?
Answers
Answered by
bobpursley
right on the second. On the first, how can the image be at the focus? That is where infinite distance rays converge.
Answered by
Anonymous
Oh yeah. I re-did it and the answer is C-15cm...?
Answered by
lily
A 5.0-cm real object is placed at a distance of 30.0 cm from a concave mirror of focal length 10.0 cm.
Find the location of the image.
ANSWER: C
Height of the object = 5.0 cm
Distance = 30.0 cm
Focal length = 10.0 cm
This is the equation:
1/Do + 1/v = 1/f
which means:
1/[distance] + 1/[location] = 1/[Focal length]
1/30.0 + 1/v = 1/10.0
1/ ((1/10.0) - (1/30.0)) = v
14.999999 = v = the location
Which of the following objects can set fire to a piece of paper in the presence of sunlight?
ANSWER: B, convex lens
Find the location of the image.
ANSWER: C
Height of the object = 5.0 cm
Distance = 30.0 cm
Focal length = 10.0 cm
This is the equation:
1/Do + 1/v = 1/f
which means:
1/[distance] + 1/[location] = 1/[Focal length]
1/30.0 + 1/v = 1/10.0
1/ ((1/10.0) - (1/30.0)) = v
14.999999 = v = the location
Which of the following objects can set fire to a piece of paper in the presence of sunlight?
ANSWER: B, convex lens
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