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प्रश्न
The shiny outer surface of a hollow sphere of aluminium of radius 50 cm is to be used as a mirror:
What will be the focal length of this mirror?
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उत्तर
संबंधित प्रश्न
What type of image is formed:
in a plane mirror?
What type of image is formed:
on a cinema screen?
When a spherical mirror is held towards the sun and its sharp image is formed on a piece of a carbon paper for some time, a hole is burnt in the carbon paper.
What name is given to the distance between spherical mirror and carbon paper?
A diverging lens is used in:
(a) a magnifying glass
(b) a car to see objects on rear side
(c) spectacles for the correction of short sight
(d) a simple camera
A 2.0 cm tall object is placed 40 cm from a diverging lens of focal length 15 cm. Find the position and size of the image.
A concave lens produces an image 20 cm from the lens of an object placed 30 cm from the lens. The focal length of the lens is:
(a) 50 cm
(b) 40 cm
(c) 60 cm
(d) 30 cm
Explain the following term:
Incident ray
Draw diagram/diagrams to show them.
The magnification for a mirror is -3. How are u and v related?
The image formed by a convex mirror is of size one third the size of object. How are u and v related?
The sun is seen before the sunrise and after the sunset.
Draw a ray diagram to show the formation of the image, when the object is placed between optical centre and principal focus of a convex lens.
State the signs and values of magnifications in the above mentioned case.
Define the following term in relation to concave mirror.
Aperture
AB is the object, A'B' is the image, and MM' is the position of the mirror. Complete the ray diagram showing the formation of the image and find the focal length of the mirror.
The following figure shows a concave mirror with its pole (P), focus (F), and center of curvature (C). Draw a ray diagram to show the formation of the image of an object AB by the concave mirror.
Complete the following diagrams shown in the following figures by drawing the reflected rays.
The spherical mirror used as a rear view mirror in the vehicle is
Numerical problem.
The radius of curvature of a spherical mirror is 25 cm. Find its focal length.
