Homework Practice

Printable assignment

Light: Practice 001

Core Ideas

Question 1mcq

A laser pointer makes a straight bright line in dusty air. What property of light does this best show?

A.Light travels in straight lines.

B.Light always bends around every obstacle.

C.Light needs air to travel.

D.Light changes into sound in dust.

Question 2mcq

Why does a sharp shadow form when an opaque book blocks sunlight?

A.The book absorbs all air around it.

B.Light travels in straight lines and cannot pass through the book.

C.Sunlight curves around the book equally on all sides.

D.The book produces its own darkness rays.

Question 3mcq

In a pinhole camera, why is the image inverted?

A.The screen turns upside down by itself.

B.The object becomes upside down in real life.

C.Light rays from the top and bottom cross at the small hole.

D.The hole reflects light like a mirror.

Question 4mcq

Which setup would best test that light travels in straight lines?

A.A magnet placed near a bulb

B.A wet cloth wrapped around a torch

C.A thermometer placed beside a mirror

D.Three cards with holes aligned so a candle is visible through them

Question 5mcq

A student says, “Light can always turn corners by itself.” Which observation corrects this?

A.A candle is not visible when the middle hole in aligned cards is shifted.

B.A bulb becomes warm after use.

C.A mirror can look shiny.

D.A red cloth looks red in sunlight.

Try These Situations

Question 6mcq

When light hits a smooth plane mirror and returns to the same medium, the process is called:

A.Refraction

B.Reflection

C.Condensation

D.Respiration

Question 7mcq

Which surface is likely to give the clearest reflection?

A.Rough wall

B.Crumpled paper

C.Polished plane mirror

D.Soil surface

Question 8mcq

A ray diagram shows a ray striking a mirror and another ray leaving it. What must be true for reflection from a plane mirror?

A.The reflected ray must enter the back of the mirror.

B.The normal is always the mirror surface itself.

C.The ray disappears after touching the mirror.

D.The incident ray, reflected ray and normal are used to describe the path.

Question 9mcq

Why does a rough metal sheet not show your face clearly even if it reflects light?

A.It scatters reflected light in many directions.

B.It absorbs all light completely.

C.It changes light into water.

D.It makes light travel slower than sound.

Question 10mcq

Which everyday object mainly works because of reflection?

A.Burning candle wax

B.Rear-view mirror of a vehicle

C.A pressure cooker whistle

D.A dry cell producing current