MEDIUM
7th CBSE
IMPORTANT
Earn 100

Identify three letters of the English alphabet or of your mother tongue whose mirror images are exactly the same as the letters.

Important Questions on Light

MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 16 - Light>EXERCISES>Q B
If you raise your right hand, your image in a plane mirror also raises its right hand. 
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 16 - Light>EXERCISES>Q B
Through which point do all rays parallel to the principal axis of a spherical mirror pass after reflection by the mirror? (Choose from: Optical centre or Focus).
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 16 - Light>EXERCISES>Q 3
Car rearview mirrors carry a warning message that 'objects in the rearview mirror are closer than they appear'. Why do you think this is so?
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 16 - Light>EXERCISES>Q 4
A concave mirror is said to have a real focus whereas a convex mirror is said to have a virtual focus. Apply the same logic to concave and convex lenses and say which of them has a real focus and which has a virtual focus.
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 16 - Light>EXERCISES>Q 5
Two different materials-glass and diamond-are used to make convex lenses of the same thickness. We know that diamond can bend light more than glass. Which lens will have a greater focal length?
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 16 - Light>EXERCISES>Q 7
How many images do you think will be formed if an object is kept between two plane mirrors parallel to each other?
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 16 - Light>EXERCISES>BE A SCIENTIST

The illustration shows an object O in front of a plane mirror.

Question Image

Which one of the light rays shown appears to come from the image of O?

MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 16 - Light>EXERCISES>VALUES

Mary saw a few children using a mirror to shine bright sunlight on the eyes of a street dog. They laughed at the discomfort of the dog. Were they doing the right thing? What value were they not showing?