Science
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
- –55 cm
- –50 cm
- –45 cm
- –40 cm
Related Questions
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 :
- Mode of intake of food
- Type of food consumed
- Presence or absence of villi in intestine
- Presence or absence of digestive enzymes
Which of the following statements is not true in reference to the diagram shown below?
- Image formed is real.
- Image formed is enlarged.
- Image is formed at a distance equal to double the focal length.
- Image formed is inverted.
In the diagram shown below n1, n2 and n3 are refractive indices of the media 1, 2 and 3 respectively. Which one of the following is true in this case?
- n1 = n2
- n1 > n2
- n2 > n3
- n3 > n1
Identify the two components of phloem tissue that help in transportation of food in plants.
- Phloem parenchyma & sieve tubes
- Sieve tubes & companion cells
- Phloem parenchyma & companion cells
- Phloem fibres and sieve tubes