- Take a V-stand and place a convex lens on this stand.
- Imagine the principal axis of the lens.
, 3) Light a candle and ask your friend to take the candle far away from the lens
along the principal axis.
- We use a screen because it forms a real image generally which will form on a screen. Real images cannot be seen with an eye.
- Adjust the screen, on other side of lens until clear image form on it.
- Measure the distance of the image from the stand and also measure the distance between the candle and stand of lens.
- Now place the candle at a distance of 60 cm from the lens. Such as the flame of the candle lie on the principal axis of the lens.
- Try to get an image of candle flame on the other side on a screen.
- Adjust the screen till you get a clear image.
- Measure the distance of image (u) from lens and record the value of u and v in the table.
- Repeat this for various distances of images in all cases note it in the table.
From this we conclude that a convex lens forms both real and virtual image when object placed at various positions.