मराठी

State the Number of Images of an Object Placed Between Two Mirrors, Formed in Each Case When Mirrors Are Inclined to Each Other at (A) 90°, and (B) 60°.

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प्रश्न

State the number of images of an object placed between two mirrors, formed in each case when mirrors are inclined to each other at (a) 90°, and (b) 60°.

बेरीज
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उत्तर

(a) Angle between the mirrors,  θ = 90o

Now, n = 360o / θo = 360o / 90= 4, which is even.

Hence number of images formed will be (n-1); i.e., 4 - 1 = 3 images

(b) Angle between the mirrors,  θ = 60o

Now, n = 360o / θo = 360o / 60= 6, which is even.

Hence number of images formed will be (n-1); i.e., 6-1 = 5 images

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पाठ 7: Reflection of Light - Exercise 7 (B) [पृष्ठ १५७]

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सेलिना Concise Physics [English] Class 9 ICSE
पाठ 7 Reflection of Light
Exercise 7 (B) | Q 1 | पृष्ठ १५७

संबंधित प्रश्‍न

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


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. 
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(B) Convex lens of focal length 24 cm
(C) Concave mirror of focal length 24 cm
(D) Convex lens of focal length 12 cm


Name the two kinds of spherical mirrors and distinguish between them. 


Name the kind of mirror used to obtain :

A real and enlarged image


An object 5 cm high is placed at a distance 60 cm in front of a concave mirror of focal length 10 cm. Find the position and size of the image. 


An object of height 2 cm is placed at a distance of 20 cm in front of a concave mirror of a focal length of 12 cm. Find the position, size, and nature of the image.


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:

concave mirror


How can you distinguish between a convex mirror and a concave mirror? Explain.

Explain why a ray of light passing through the center of curvature of a concave mirror, gets reflected along with the same pattern.


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