10class reflection of light at curved surfaces

When we place an object between P and F of a concave mirror, the distance of the image consider as….

• Positive

• Negative

• Positive or Negative

• Neither positive nor negative

Which formula is right for a concave mirror

• 1/f=uv/u+v
• f=uv/(u+v)
• f=uv/u-v
• 1/f=1/u-1/v

Which mirror has the Focus and centre of curveture at the same point

• Concave
• Convex
• Plane mirror
• No mirror

The shaving mirrors, dentists mirrors work on, when the object is at

• at C
• in between C and F
• at F
• in between f and p

The mirror which has wide field of view is

• Concave mirror
• Convex mirror
• Plane mirror
• None of these

The laws of reflection of light are valid for

• Plane mirrors only
• Concave mirrors pnly
• convex mirrors only
• all mirrors

Which mirror is used by dentists

• Concave
• Convex
• Plane
• None

Which mirrors are used as rear view mirrors

• Convex
• Concave
• Plane
• None

Which type of mirrors are used in headlights of vehicles?

• Plane
• Convex
• Concave
• None

Concave mirror is used

• by Dentists
• In car head lights
• In car head lights & by Dentists
• No answer