Optics

A PLANE MIRROR IS AN EXAMPLE OF A _____ SURFACE

• SMOOTH

• ROUGH

Tags

NGSS.MS-PS4-2

MIRROR CURVES INWARD

• PLANE

• CONVEX

• CONCAVE

Tags

NGSS.MS-PS4-2

MIRROR CURVES OUTWARD

• PLANE

• CONVEX

• CONCAVE

WHAT HAPPENS WHEN LIGHT REFLECTS OFF A ROUGH SURFACE?

• IT TRAVELS IN THE SAME DIRECTION

• IT SCATTERS

• IT DIES

• IT MOVES IN A REGULAR PATTERN

Tags

NGSS.MS-PS4-2

The refractive index of four substances A, B,

C and D are 1.31, 1.43, 1.33, 2.4 respectively.

The speed of light is maximum in

• A

• B

• C

• D

Tags

NGSS.MS-PS4-2

Where should an object be placed so that a real and inverted image of same size is obtained by a convex lens

• f

• 2f

• infinity

• between f and 2f

A convex lens forms a real, diminished point

sized image at focus. Then the position of the

object is at

• focus

• infinity

• at 2f

• between f and 2f

Tags

NGSS.MS-PS4-2

Which of the following lens would you prefer

to use while reading small letters found in a

dictionary?

• A convex lens of focal length 5 cm

• A concave lens of focal length 5 cm

• A convex lens of focal length 10 cm

• A concave lens of focal length 10 cm

If VB, VG, VR be the velocity of blue, green

and red light respectively in a glass prism,

then which of the following statement gives

the correct relation?

• V_B = V_G = V_R

• V_B > V_G >V_R

• V_B < V_G < V_R

• V_B < V_G > V_R

Tags

NGSS.MS-PS4-2

A small bulb is placed at the principal focus

of a convex lens. When the bulb is switched

on, the lens will produce

• a convergent beam of light

• a divergent beam of light

• a parallel beam of light

• a coloured beam of light

Tags

NGSS.MS-PS4-2