Light 10th

      YASH   CLASSES

    Light 1

Q.1. An object of size 5 cm is placed at 

a distance of 25 cm from the pole of a 

concave mirror of radius of curvature 

30 cm. Calculate the distance and size

 of the image so formed. What will be

 the nature of the image?

Q.2. An object, 4.0 cm in size, is placed 

at 25.0 cm in front of a concave mirror

 of focal length 15.0 cm. At what distance 

from the mirror should a screen be 

placed in order to obtain a sharp image? 

Find the nature and the size of the image.

Q. 3. An object 2 cm in size is placed

 30 cm in front of a concave mirror

 of focal length 15 cm. At what distance

 from the mirror should a screen be

 placed in order to obtain a sharp image?

 What will be the nature and the size

 of the image formed? Draw a ray 

diagram to show the formation of the

 image in this case.

Q.4. A convex mirror used for rear-view 

on an automobile has a radius of

 curvature of 3.00 m. If a bus is located 

at 3.00 m from this mirror, find the 

position nature and size of the image. 

Q.5. A convex mirror used on a moving automobile has a radius of curvature 

of 3.0 m. If a truck is following it at a

 constant distance of 4.5 m, find 

the position,  the nature and 

 the magnification for the image. 

Q. 6. Q. 41. A concave mirror produces

 three times enlarged image of an placed

 at 10 cm in front of it. Calculate the

 radius of curvature of the mirror.

Q. 7.An object is kept in front of a concave

 mirror of focal length 20 cm. The image

 formed is three times the size of the object. Calculate the two possible distances of

 the object from the mirror.

Q.8. A burning candle is placed 20 cm 

in front of a concave mirror of focal 

length 10 cm. Find the nature and 

position of the image formed. 

[Ans20 cm, real and inverted]

Q. 9.An object is placed at a distance of 

4 cm from a concave mirror of focal

 length 1 cm. Find the position and nature 

of image. [Ans . 6 cm, virtual and erect]

Q. 10. An object is placed at a distance

 of 10 cm from a convex mirror of focal

 length 20 cm. Find the position and 

nature of image. (Ans. 6.67 cm, virtual

 and erect)

Q.11. A concave mirror produces a real

 image of height 2 cm of an object of

 height 0.5 cm placed 10 cm away from

 the mirror. Find the position of the

 image and focal length of the mirror.

[Ans. v = 40cm, f = - 8cm]

Q. 12. An object 2 cm high is placed at 

a distance of 16 cm from a concave

 mirror which produces a real image

 3 cm high.

(a) What is the focal length of the mirror?

(b) Find the position of the image.

[Ans. f = - 9.6cm, v = - 24cm ]