Lenses and mirrors
A convergent beam of light passes through a diverging lens of focal length 0.2 m and comes to focus 0.3 m behind the lens. The position of the point at which the beam would converge in the absence of the lens is :
Here,
from lens equation
Therefore, in the absence of lens, the beam would coverage at a distance of to the right of the concave lens.
Ai এর মাধ্যমে
১০ লক্ষ+ প্রশ্ন ডাটাবেজ
প্র্যাকটিস এর মাধ্যমে নিজেকে তৈরি করে ফেলো
উত্তর দিবে তোমার বই থেকে ও তোমার মত করে।
সারা দেশের শিক্ষার্থীদের মধ্যে নিজের অবস্থান যাচাই
Fill in the following blanks with suitable words :
(a) Parallel rays of light are refracted by a convex lens to a point called the ______
(b) The image in a convex lens depends upon the distance of the ____ from the lens.
The distance between the extreme points on the periphery of the mirror is called:
The maximum magnification that can be obtained with a convex lens of focal length is ( the least distance of distinct vision is )
Which lens has magnification less than
