Advertisements
Advertisements
Question
Fill in the following blank with suitable word:
A convex lens .................. rays of light, whereas a concave lens .................. rays of light.
Solution
A convex lens converges rays of light, whereas a concave lens diverges rays of light.
APPEARS IN
RELATED QUESTIONS
Copy and complete the diagram below to show what happens to the rays of light when they pass through the concave lens:
Which type of lenses are:
thinner in the middle than at the edges?
Show by drawing a ray-diagram that the image of an object formed by a concave lens is virtual, erect and diminished.
When an object is placed 10 cm in front of lens A, the image is real, inverted, magnified and formed at a great distance. When the same object is placed 10 cm in front of lens B, the image formed is real, inverted and same size as the object.
What is the focal length of lens A?
Where will the image be formed if an object is kept in front of a concave lens at a distance equal to its focal length? Draw a ray diagram to illustrate your answer.
A lens forms an upright and diminished image of an object irrespective of its position. What kind of lens is this?
How will you differentiate between a convex and a concave lens by looking at
- a distant object,
- a printed page?
Choose the correct alternative and rewrite the following:
Inside water, an air bubble behaves ....................
An object is placed in front of a lens between its optical centre and focus. The formed image is virtual, erect, and diminished. Name the lens used.
