Question

4. Analyse the following observation table showing variation of image distanco (V) with object
distance (u) in case of a convex lens and answer the questions that follow without doing any
calculation (Any 4)
SR OBJECT
IMAGE
NO DISTANCE(U) in DISTANCEV) in cm.
cm
1
-100
+25
2.
-60
+30
-40
+40
-30
+60
5
-25
+100
6.
-15
+120
1) The local length of the given convex lens is
a), 20 cm
b). -20cm
c) 40cm
d) -40cm
5) Select the serial number of the observation which is not correct.
a). SR. NO. 1
b). SR. NO. 2
c). SR. NO. 6
d). SR. NO 6
1) Which serial number is depicted by the following diagram
a) SR. NO.1
b) SR. NO. 2
C). SR. NO 3
d) SR. NO 4
i) The magnification of serial number 4 is
a). -1
b). 1
c). -0.5
d). +0,5
v) At which position should the object be kept to obtain the image at infinity
a). U=20cm
b) =-20cm
c). u=10cm
d) = 10cm
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Answer 1

Answer:

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