Advertisements
Advertisements
प्रश्न
Complete the following diagrams shown in Fig. by drawing the reflected ray for each of the incident ray A and B.
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
A student obtains a sharp image of the distant window (W) of the school laboratory on the screen (S) using the given concave mirror (M) to determine its focal length. Which of the following distances should he measure to get the focal length of the mirror?
Explain the following term related to spherical lenses:- optical centre
Explain the following term related to spherical lenses: focal length
The diverging lens in part (a) is replaced by a converging lens also of focal length 100 mm. The object remains in the same position and an image is formed by the converging lens. Compare two properties of this image with those of the image formed by the diverging lens in part (a).
An optical device has been given to a student and he determines its focal length by focusing the image of the sun on a screen placed 24 cm from the device on the same side as the sun. Select the correct statement about the device.
(A) Convex mirror of focal length 12 cm
(B) Convex lens of focal length 24 cm
(C) Concave mirror of focal length 24 cm
(D) Convex lens of focal length 12 cm
What is meant by magnification? Write its expression. What is its sign for the (a) real (b) virtual, image?
Answer the following question.
Write the modification in the curvature of the eye lens which enables us to see the nearby objects clearly?
Define the following term in relation to concave mirror.
Radius of curvature
The radius of curvature of a spherical mirror is 18 cm. What is the focal length of this mirror?
