B.S.T./YEAR 4/WEEK 5/3RD TERM

Light travels in_______

• straight line

• curved line

• Zigzag line

When an opaque object comes in the path of light it forms

• depends on the colour of the light

• an image with colours

• shadow

• black and white image

Which types of objects do not allow light to pass through them?

• Translucent

• Opaque

• Transparent

When the sun gets higher in the sky, shadows get ______.

• longer

• shorter

• darker

Which is an example of a translucent object?

• A thin sheet of paper

• A thin glass slab

• A thin iron sheet

Bouncing back of light from shining surfaces is called

• Reflection

• Refraction

• Dispersion

Out of these, which one is not a man-made luminous body?

• Electric bulb

• Burning candle

• Firefly

• Oil lamp

……………… objects cast no shadow

The speed of light

• 299,792m/s

• 299,792m/s

• 29,791m/s

• 299,792km/s

Opaque objects cast …………………. shadows in morning and evening while ………………… shadows at noon.

• Short, medium

• Short, Long

• Long, Short

• None of the above