Question

A safety mirror used in a curved section of the hillside road has a
radius of curvature 8 m. If a car of height 2 m is approaching at a
distance of 20 m from the mirror, find the position, nature and size of
the image of the car formed in the mirror with the help of a ray
Diagram​

Answer 1

Answer:

answr

search

What would you like to ask?

12th

Physics

Ray Optics and Optical Instruments

Image Formation by Spherical Mirror

A concave mirror has radius...

PHYSICS

A concave mirror has radius of curvature of 40cm. It is at the bottom of a glass that has water filled up to 5cm (see figure). If a small particle is floating on the surface of water, its image as seen, from directly above the glass, is at a distance d from the surface of water. The value of d is close to : (Refractive index of water =1.33)

1614884

MEDIUM

Share

Study later

ANSWER

Light incident from particle P will be reflected at mirror

u=−5cm,f=−

2

R

=−20cm

v

1

+

u

1

=

f

1

v

1

=+

3

20

cm

This image will act as object for light getting refracted at water surface

So, object distance d=5+

3

20

=

3

35

cm

below water surface,

After refraction, final image is at

d

′

=d(

μ

1

μ

2

)

=(

3

35

)(

4/3

1

)

=

4

35

=8.75cm

≈8.8cm

solution

Answer 2

Explanation:

$\red{ \underline \red{ \over{ \mid \green{{\huge \frak{QuésTion:-}}} \mid}}}$

★ The intersection of a colum and row is called a Cell ?

$\red{ \underline \red{ \over{ \mid \green{{\huge \frak{₳ηsωεя:-}}} \mid}}}$

South Korea

The two major disadvantages of wind power include initial cost and technology immaturity. Firstly, constructing turbines and wind facilities is extremely expensive.

The second disadvantage is technology immaturity.