Intro to Thin Lenses

Q. A converging lens is used to form an image on a screen. When upper half of the lens is covered by an opaque screen

1. Complete image will be formed of same intensity
2. Complete image will be formed of decreased intensity
3. Half the image will disappear
4. Half image will be formed of same intensity

Q. The lens in spectacles can be approximated to thin lens.

1. True
2. False

Q. A convex lens of focal length f is placed at origin. Object is placed on negative x-axis anywhere between $-\infty$ to $+\infty$. Choose correct graph between 'u' and 'v'.

1. 
2. 
3. 
4. 

Q. A converging lens is used to form an image on a screen. When upper half of the lens is covered by an opaque screen

1. Half the image will disappear
2. Complete image will be formed of same intensity
3. Half image will be formed of same intensity
4. Complete image will be formed of decreased intensity

Q. The lens in spectacles can be approximated to thin lens.

1. True
2. False

Q. A convex lens of focal length f is placed at origin. Object is placed on negative x-axis anywhere between $-\infty$ to $+\infty$. Choose correct graph between 'u' and 'v'.

1. 
2. 
3. 
4. 

Q. A converging lens is used to form an image on a screen. When upper half of the lens is covered by an opaque screen

1. Half the image will disappear
2. Complete image will be formed of same intensity
3. Half image will be formed of same intensity
4. Complete image will be formed of decreased intensity

Q. A convex lens of focal length f is placed at origin. Object is placed on negative x-axis anywhere between $-\infty$ to $+\infty$. Choose correct graph between 'u' and 'v'.

1. 
2. 
3. 
4. 

Q. The lens in spectacles can be approximated to thin lens.

1. True
2. False

Q. A convex lens of focal length f is placed at origin. Object is placed on negative x-axis anywhere between $-\infty$ to $+\infty$. Choose correct graph between 'u' and 'v'.

1. 
2. 
3. 
4.