Question

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Answer 1

Answer:

¤ Given ¤

Number of mirrors = 2

Angle at which the mirrors are = 45°

¤ To find ¤

Number of image formed in the mirrors.

¤ Taken ¤

Number of image formed:

$\boxed{n=\frac{360°}{I}-1}$

Where,

n = Number of image formed

I = Angle at which the mirror are placed

¤ Concept ¤

Divide the 45° angle with 360° . Then subtract it with 1 to find the number of image formed .

¤ Solution ¤

$Taken,n=\frac{360°}{I}-1$

$\implies{n=\frac{360°}{45°}-1}$

$\implies{n=8-1}$

$\implies{n=7}$

¤ Answer ¤

So , the number of image formed in the mirror is 7 .

¤ Extra information ¤

Area of the triangle:

$At=\frac{H×B}{2}$

Where,

At = Area of the triangle

H = Height

B = Breadth

To find magnification:

$m=\frac{Si}{So}$

Where,

m = Magnification

Si = Size of the image

So = Size of the object

To find size of the object:

$So=\frac{Si}{m}$

Answer 2

Answer:

IT'S OPTION D . (7)

Explanation:

$<font color="blue">$

GIVEN:

TWO MIRRORS INCLINED AT AN ANGLE OF 45°.

TO FIND:

IMAGES FORMED.

FORMULA TO BE USED:

IMAGES=(360°/ANGLE BETWEEN MIRRORS )-1

=360°/45°-1

=8-1=7IMAGES FORMED.