Reflection of Light at Curved Surfaces Revision Test

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N.Srinivas, SA(Phy.Sci.), 9246865883
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The image formed by a concave mirror is *

1 point

Always virtual

Can be both real and virtual

Always real

None of these

Mirror formula *

1 point

1/f=1/u+1/v

R=2f

f=v+u

v=f+u

R=2f is valid for *

1 point

plane mirrors

concave lenses

convex lenses

both convex and concave mirrors

The image formed by a convex mirror is *

1 point

None of these

Always real

Always virtual

Can be both real and virtual

Which type of mirrors are used in headlights of vehicles? *

1 point

Convex

Concave

None

Plane

The relation between object distance 'u', image distance 'v' and focal length 'f' is 1/f= *

1 point

v-u=f

v+u=f

1/v-1/u=1/f

1/v+1/u=1/f

When an object is placed between mirror and focus, the image is formed *

1 point

At infinity

Beyond C

At C

Behind mirror

Which mirrors were used by Archimedes to burn enemy ships(Convex, Concave, Plane, None) *

1 point

Plane

None

Concave

Convex

The relation between object distance 'u', image distance 'v' and focal length 'f' is 1/u= *

1 point

1/u=1/f-1/v

v+u=f

v-u=f

1/v-1/u=1/f

Name

In the case of _____ mirror magnification is always positive *

1 point

Both

None

Concave

Convex

The light ray passing througth the _________reflects back in the same path *

1 point

Pole

Center of curveture

Radius of curveture

Focus pole

An object is placed at 20 cm away on principal axis of a concave mirror of 15 cm focal length, image distance is *

1 point

-5 cm

-30 cm

-35 cm

-60 cm

Where should we place the object, to get image at infinity *

1 point

Beyond C

At F

Between P and F

Between F and C

The angle between normal and reflected ray is called *

1 point

angle of ray

angle of reflection

angle of incidence

angle of normal

What is the radius of curvature of a mirror if its focal length is 20 cm *

1 point

None

40 cm

10 cm

20 cm

Where should we place the object, to get same size image but inverted *

1 point

At F

At C

Between F and C

Between F and P

Which mirror is used by dentists(Concave, Convex, Plane, None) *

1 point

Convex

None

Plane

Concave

The ratio of focal length of a spherical mirror to its radius of curvature is *

1 point

0.5

An object of size 7 cm is palced at 27 cm infront of a concave mirror of focal length 18 cm. Image distance is *

1 point

-54 m

-54 cm

54 m

54 cm

If the hole of pin hole is increased,the image image becomes________ *

1 point

clear

diminished

blurred

inlarged

The scientist who burned ships using mirrors is ____ *

1 point

Pierre de fermat

Archimedes

Boyle

Newton

The laws of reflection of light are valid for *

1 point

Concave mirrors pnly

all mirrors

Plane mirrors only

convex mirrors only

In the case of _____ mirror magnification is always positive *

1 point

Convex

Plane

Both

None

The relation between object distance 'u', image distance 'v' and focal length 'f' is 1/v= *

1 point

1/v-1/u=1/f

v+u=f

v-u=f

1/v=1/f-1/u

The scientist who used mirrors ti burn ships was *

1 point

format

Newton

archimedes

pascal

A concave mirror always forms real image except when the object is placed *

1 point

at F

between F anc C

between F and P

at infinity

Where should we place the object infront of a concave mirror to get a virtual image *

1 point

At F

Between C and F

Between P and F

At C

In the case of _____ mirror magnification is negative *

1 point

Convex

Concave

None

Plane

The ratio of radius of curvature of a spherical mirror to its focal length is *

1 point

0.1

When light reflected from a surface, the angle of incidence is 30 degrees, then angle of reflection is *

1 point

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