HARD
7th CBSE
IMPORTANT
Earn 100

Explain the set-up used by Newton to obtain a spectrum.

Important Questions on Light

MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 16 - Light>EXERCISES>Q 1
What will be the difference in the size of the image (of the same object) formed by a small and a large plane mirror?
MEDIUM
7th CBSE
IMPORTANT
Living Science 7>Chapter 16 - Light>EXERCISES>Q 2
Identify three letters of the English alphabet or of your mother tongue whose mirror images are exactly the same as the letters.
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?