EASY
10th Mizoram Board
IMPORTANT
Earn 100

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.

Important Questions on Light - Reflection and Refraction

EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 10 - Light - Reflection and Refraction>QUESTIONS>Q 3
Find the power of a concave lens of focal length 2 m.
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 10 - Light - Reflection and Refraction>EXERCISES>Q 1
Which one of the following materials cannot be used to make a lens?
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 10 - Light - Reflection and Refraction>EXERCISES>Q 2
The image formed by a concave mirror is observed to be virtual, erect and larger than the object. Where should be the position of the object?
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 10 - Light - Reflection and Refraction>EXERCISES>Q 3
Where should an object be placed in front of a convex lens to get a real image of the same size of the object? 
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 10 - Light - Reflection and Refraction>EXERCISES>Q 4
Both spherical mirror and a thin spherical lens have a focal length of -15 cm. The mirror and the lens are likely to be 
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 10 - Light - Reflection and Refraction>EXERCISES>Q 5
No matter how far you stand from a mirror, your image appears erect and smaller than you. The mirror is likely to be 
EASY
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 10 - Light - Reflection and Refraction>EXERCISES>Q 6
Which of the following lenses would you prefer to use while reading small letters found in a dictionary? 
HARD
10th Mizoram Board
IMPORTANT
SCIENCE TEXTBOOK FOR CLASS X>Chapter 10 - Light - Reflection and Refraction>EXERCISES>Q 7
We wish to obtain an erect image of an object, using a concave mirror of focal length 15 cm. What should be the range of distance of the object from the mirror? What is the nature of the image? Is the image larger or smaller than the object? Draw a ray diagram to show the image formation in this case.