MEDIUM
12th West Bengal Board
IMPORTANT
Earn 100
A spherical mirror has a single focal point, but a lens has two focal points. What is the reason of this difference?
Important Questions on Refraction at Spherical Surfaces and Spherical Lens
MEDIUM
12th West Bengal Board
IMPORTANT
By what observations can you decide the nature of the lenses of the two spectacles of powers and
MEDIUM
12th West Bengal Board
IMPORTANT
When is the image formed by a convex lens virtual?
MEDIUM
12th West Bengal Board
IMPORTANT
A convex lens is placed over a plane mirror. If a point source of light is placed at the focus of the lens where will the image be formed? Draw the ray diagram.
MEDIUM
12th West Bengal Board
IMPORTANT
An object is placed at the focus of a concave lens. Where will be the image formed?
MEDIUM
12th West Bengal Board
IMPORTANT
The focal lengths of a convex lens and a concave mirror are same in air. If the lens and mirror be immersed in water, will their focal lengths change? If not, which one will have greater focal length?
MEDIUM
12th West Bengal Board
IMPORTANT
Will the two focal lengths of a lens be equal if the media on two sides of the lens are not the same?
EASY
12th West Bengal Board
IMPORTANT
Write the lens maker's formula.
MEDIUM
12th West Bengal Board
IMPORTANT
An air bubble is formed inside water. Does it act as a converging or diverging lens?
