an object of 4 cm height is placed 30 cm away from a convex lens of fo

1.	an object of 4 cm height is placed 30 cm away from a convex lens of focus length 20cm. and what will be the height of the image.
Answer» Answer: Answer Expert Verified 4.0/5 182 santy2 Ace 6.7K answers 32.9M people helped In this question I am going to USE a scale of 1:5 to DRAW this diagram. When I use this scale: Focal length =20/5=4cm Object HEIGHT =4/5=0.8cm The object distance =30/5 =6cm. From the diagram, the image height is 1.6cm. Which from the scale is : 1.6 × 5=8cm The ratio of image SIZE to object size is : 8:4=2:1 The ratio= 2:1

an object of 4 cm height is placed 30 cm away from a convex lens of focus length 20cm. and what will be the height of the image.

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santy2

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In this question I am going to USE a scale of 1:5 to DRAW this diagram.

When I use this scale:

Focal length =20/5=4cm

Object HEIGHT =4/5=0.8cm

The object distance =30/5 =6cm.

From the diagram, the image height is 1.6cm.

Which from the scale is : 1.6 × 5=8cm

The ratio of image SIZE to object size is : 8:4=2:1

The ratio= 2:1

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an object of 4 cm height is placed 30 cm away from a convex lens of focus length 20cm. and what will be the height of the image.​

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an object of 4 cm height is placed 30 cm away from a convex lens of focus length 20cm. and what will be the height of the image.