EXERCISES
Mukul Sahgal Science Solutions for EXERCISES
Simple step-by-step solutions to EXERCISES questions of Light from Living Science 7. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.
Questions from EXERCISES with Hints & Solutions
If the distance of an object from a convex lens is equal to twice the focal length of the lens, where is the image formed- beyond or at ?
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?
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.
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?
In which mirror are all normals at the surface parallel to each other - plane mirror, concave mirror or convex mirror?
How many images do you think will be formed if an object is kept between two plane mirrors parallel to each other?
The illustration shows an object O in front of a plane mirror.
Which one of the light rays shown appears to come from the image of O?
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?
