Question
A concave lens has a focal length 15 cm. If the object
is placed at 30 cm from the lens, what is the image distance?Solution
focal length f = -15 cm Distance of object u = -30 cm 1/ v = 1/f +1/u substituting these values in the lens equation we get, 1/v =1/-15 +1/-30 1/v =-3/30 v = -10cm Hence, the distance of the object from the lens is 10 cm and the negative sign signifies a virtual image.
'Bauds' is a unit linked with ________________.
Which of these companies own the search engine Bing?
What was the name of first indian webb browser ?
To delete the selected item permanently, which of the following shortcut key combination should be used?
Which of the following keyboard shortcuts is used to switch to the last tab of the Chromebrowser?
The text that appears at the top of each page is called
Name the another pointing device which is an alternative to mouse?
Which of the following is not a data structure?
Which of the following command is used to set a name to a disk in DOS ?
Large transaction processing systems in automated organizations use ________.
Relevant for Exams:
