Related Questions

Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?
একটি দ্বি-উত্তল অভিসারি লেন্সের প্রত্যেক পৃষ্ঠের বক্রতার ব্যাসার্ধ 30cm এবং গ্লাসের প্রতিসরাঙ্ক 1.50। লেন্সটির ফোকাস দৈর্ঘ্য কত হবে? (The radius of curvatures of both surfaces of a double convex lens are 30cm each and refractive index of glass is 1.50. What will be focal length of the lens?)
In a concave mirror when the object is placed at infinity which of the following applies to the image?
In case of a concave mirror, if an object is kept between principal focus F and pole P of the mirror, then which one of the following statements about the image is not correct?
Find the position of the image formed by a concave mirror when the object is placed between P and F?
Which of the following function creates a CSS gradient image that can be used anywhere an image URL is required, including background-image, border-image, and list-style properties?
A form sorting machine can sort 12 forms in 10 minutes. How many forms can it sort in one and half hours at this rate ?
If special forms are needed for printing the output, the programmer specifies these forms through
Identify the incorrect word/phrase in the following: Many who are (a) boring  with traditional forms of examination (b) can be seen to have passionate interest (c) In solving problems (d) presented  in popular puzzle forms.
1m ফোকাল লেংথের একটি উত্তল ( convex ) এবং 10 cm ফোকাল লেংথের একটি অবতল ( concave) লেন্স ব্যবহার করে একটি টেলিস্কোপ তৈরী করা হলে টেলিস্কোপটির দৈর্ঘ্য কত হবে?