Which of the following statements is not true in reference to the diagram shown below?

1. Image formed is real.
2. Image formed is enlarged.
3. Image is formed at a distance equal to double the focal length.
4. Image formed is inverted.

The radius of curvature of a converging mirror is 30 cm. At what distance from the mirror should an object be placed so as to obtain a virtual image?

1. Infinity
2. 30 cm
3. Between 15 cm and 30 cm
4. Between 0 cm and 15 cm

The length of small intestine in a deer is more as compared to the length of small intestine of a tiger. The reason for this is :

1. Mode of intake of food
2. Type of food consumed
3. Presence or absence of villi in intestine
4. Presence or absence of digestive enzymes

A converging lens forms a three-times magnified image of an object, which can be taken on a screen. If the focal length of the lens is 30 cm, then the distance of the object from the lens is

1. –55 cm
2. –50 cm
3. –45 cm
4. –40 cm