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Solutions of Reflection of Light (Page No- 210) - Physics By Lakhmir Singh, Class 10 | Extra Documents, Videos & Tests for Class 10 PDF Download

Lakhmir Singh Physics Class 10 Solutions Page No:210

Question 11: An object is placed 15 cm from (a) a converging mirror, and (b) a diverging mirror, of radius of curvature 20 cm. Calculate the image position and magnification in each case.

Solution :

Solutions of Reflection of Light (Page No- 210) - Physics By Lakhmir Singh, Class 10 | Extra Documents, Videos & Tests for Class 10

fig. formation of image by the 'concave mirror when the object Is palced between its pole and focus. 

(b) f = -20cm. u = -10cm. v= ?

We know that 

Solutions of Reflection of Light (Page No- 210) - Physics By Lakhmir Singh, Class 10 | Extra Documents, Videos & Tests for Class 10

(c) Characteristics of image formed
(i) Image is virtual.
(ii) Image is erect. 

Question 12: An object 20 cm from a spherical mirror gives rise to a virtual image 15 cm behind the mirror. Determine the magnification of the image and the type of mirror used.

Solution : u = -20cm v = 15cm (virtual image)

We know that 
Solutions of Reflection of Light (Page No- 210) - Physics By Lakhmir Singh, Class 10 | Extra Documents, Videos & Tests for Class 10

The mirror used is of convex type. 

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FAQs on Solutions of Reflection of Light (Page No- 210) - Physics By Lakhmir Singh, Class 10 - Extra Documents, Videos & Tests for Class 10

1. What is reflection of light?
Ans. Reflection of light is the phenomenon where light waves bounce off a surface and change direction. It occurs when light waves encounter a smooth and shiny surface, such as a mirror or a polished metal surface.
2. What are the laws of reflection?
Ans. The laws of reflection state that: 1. The angle of incidence is equal to the angle of reflection. 2. The incident ray, the normal to the surface at the point of incidence, and the reflected ray all lie in the same plane.
3. How does reflection of light help us see objects?
Ans. When light falls on an object, it reflects off its surface and enters our eyes. This reflected light carries information about the object's color, shape, and texture. Our eyes receive this light and send signals to the brain, which processes the information and allows us to see the object.
4. What is the difference between regular reflection and diffuse reflection?
Ans. Regular reflection occurs when light waves reflect off a smooth surface and all the reflected waves are parallel to each other. This type of reflection produces a clear and well-defined image, as seen in a mirror. On the other hand, diffuse reflection occurs when light waves reflect off a rough or irregular surface. The reflected waves scatter in different directions, resulting in a hazy or blurred reflection. This type of reflection is responsible for the visibility of non-shiny objects, as it diffuses light in all directions.
5. How does the angle of incidence affect the angle of reflection?
Ans. According to the laws of reflection, the angle of incidence is equal to the angle of reflection. This means that if the angle of incidence is increased, the angle of reflection will also increase by the same amount. Similarly, if the angle of incidence is decreased, the angle of reflection will decrease accordingly.
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