Light

What is the difference between reflection and refraction?

• Reflection is the bouncing back of light; refraction is the bending of light.

• Reflection and refraction are the same phenomenon.

• Reflection is the bending of light; refraction is the bouncing back of light.

• Reflection occurs only in water; refraction occurs in air.

What is a prism used for?

• To enhance the brightness of colors.

• To measure the temperature of liquids.

• To create a solid shape for storage.

• To refract light and separate it into colors.

What is the source of natural light?

• The moon

• Artificial lights

• The sun

• Fireflies

What is the role of light in photosynthesis?

• Light is only needed for plant growth, not photosynthesis.

• Light is used to absorb nutrients from the soil.

• Light is a byproduct of photosynthesis.

• Light is essential for photosynthesis as it provides the energy required for the conversion of carbon dioxide and water into glucose.

An example of luminous object is-

• 
• 
• 
• 

Objects that allow only a small amount of light to pass through them are called as-

• Opaque Object

• Transparent Object

• Translucent Object

• None of these

The main sources of light on the Earth can be broadly classified into (a)  

What is the process called when light bounces off a surface?

• Diffraction

• Refraction

• Absorption

• Reflection

What do we call the dark area that forms when an object blocks light?

• shadow

• glare

• illumination

• reflection

How does light travel?

• Light travels only in straight lines.

• Light travels in waves and particles (photons) at a speed of about 299,792 km/s in a vacuum.

• Light is made up of solid particles that do not move.

• Light travels faster in water than in a vacuum.