An object is moving with velocity 6 ms–1 towards a plane mirror, what will be

An object is moving with velocity 6 ms–1 towards a plane mirror, what will be

the velocity of image towards the (i) mirror (ii) object?

Ans: – The velocity of image towards the mirror is 6m/s,

The velocity of the image towards the object is 12m/s.

The image of an object placed at 10 cm from the mirror is formed at 10 cm behind the mirror. If the object is displaced by 4 cm towards the mirror, by what distance will the image be displaced with respect to the (i) mirror (ii) object?

Ans: – As we know, 1/f=1/v + 1/u;

Here, u=10 and v=-10;

Or, 1/f=1/10 + 1/ (-10) = 0;

Or, f= infinity,

So, the object will be displaced by 4m by mirror.

Some letters are given in following boxes. Make the meaningful words related to reflection of light choosing the horizontal and vertical sequencing.

Ans: –  The words are, (i) Real, (ii)Erect, (iii) Plane, (iv) Virtual, (v)Image.

 

The distance and height of an object placed infront of a plane mirror are givenin column A and B respectively. In column C and D the distance of image andheight of image are given but not in same order. Correct the order.

Ans: –

A	B	C	D
10cm	5cm	10cm	5cm
5cm	10cm	5cm	10cm
6cm	8cm	6cm	8cm

 

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