LIGHT class 10

A concave mirror produces a magnification of +4. The object is placed:

• At the focus

• Between focus and centre of curvature

• Between focus and pole

• Beyond the centre of curvature

The radius of curvature of a mirror is 20cm the focal length is

• 20 cm

• 10 cm

• 40 cm

• 5 cm

Convex lens focus a real, point sized image at focus, the object is placed

• At focus

• Between F and 2F

• At infinity

• At 2F

In optics an object which has higher refractive index is called

• Optically rarer

• Optically denser

• Optical density

• Refractive index

A concave mirror gives real, inverted and same size image if the object is placed

• At F

• At infinity

• At C

• Beyond C

Image formed by plane mirror is

• Real and erect

• Real and inverted

• Virtual and erect

• Virtual and inverted

A ray of light is travelling in a direction perpendicular to the boundary of a parallel glass slab. The ray of light:

• Is refracted towards the normal

• Is refracted away from the normal

• Is reflected along the same path

• Does not get refracted

mirror

• absorbs
• reflects 
• refracts

Tags

NGSS.MS-PS4-2

When we look into a glass mirror, light...

• Bends as it passes through
• Bounces back in a random order
• Hits the mirror and is absorbed
• Bounces back at the same angle it strikes the mirror at

Tags

NGSS.MS-PS4-2

When we looked at our pencil in a beaker of water it looked bent, why?

• The light bends the pencil
• Light reflects off of the water
• Light changes direction in the water

Tags

NGSS.MS-PS4-2