MEDIUM
10th Nagaland Board
IMPORTANT
Earn 100

Explain the refraction of light through a rectangular glass slab with the help of a labelled diagram.

Important Questions on Light - Reflection and Refraction

MEDIUM
10th Nagaland Board
IMPORTANT
A concave lens has focal length 15 cm. At what distance should the object from the lens be placed so that it forms an image at 10 cm from the lens? Also find the magnification produced by the lens.
EASY
10th Nagaland Board
IMPORTANT
A convex lens forms a real and inverted image of a needle at a distance of 50 cm from it. Where is the needle placed in front of the convex lens, if the image is equal to the size of the object? Also find the power of the lens.
MEDIUM
10th Nagaland Board
IMPORTANT
Draw a ray diagram and describe the image formation by a convex mirror when an object is placed at (i) infinity (ii) a finite distance.
MEDIUM
10th Nagaland Board
IMPORTANT
Draw a ray diagram and describe the image formation by a concave lens when an object is placed at (i) infinity (ii) a finite distance.
EASY
10th Nagaland Board
IMPORTANT
Where should an object be placed in front of a convex lens to get a real image of the size of the object? 
EASY
10th Nagaland Board
IMPORTANT
The change in focal length of an eye lens is caused by the action of the
EASY
10th Nagaland Board
IMPORTANT
Define power of a lens. What is its unit?