A
Which radiation can be used to detect people with fever in airports?
Infrared
Fill in the blank: ______ sensors help robotic vacuum cleaners detect stairs and avoid falling.
Infrared
Riddle: I can see when you’re warm but I’m not alive. I help hospitals detect fevers. What am I?
Thermal imaging camera (Infrared sensor)
What is one effect of overexposure to infrared radiation?
Eye damage
How does a robotic vacuum cleaner avoid falling down the stairs while cleaning?
t uses infrared sensors that detect the floor; when there is no reflected signal (e.g. at the edge of stairs), it changes direction to avoid falling.
What kind of radiation helps in producing vitamin D in our body?
UVB radiation
Short Answer: How does visible light help plants survive?
It provides energy for photosynthesis to make food.
Fill in the blank: UV radiation is used to ______ medical equipment.
sterilize
Riddle: I’m invisible to your eye, but I help clean things without water or soap. What radiation am I?
Ultraviolet (UV)
What happens to the light rays on a smooth surface?
They reflect evenly
Which radiation can cause skin cancer if you're overexposed?
UV
Short Answer: Why is flash photography not allowed in some museums?
Because light can cause chemical changes in materials, damaging them over time.
Fill in the blank: Too much light in the environment is called ______.
light pollution
Riddle: I help turtles find the sea at night, but if there’s too much of me, they get lost. What am I?
Natural light (or moonlight)
State one effect that is not harmful caused by light pollution
Helps plants grow
Which radiation helps robotic vacuum cleaners detect stairs?
Infrared
Short Answer: How does AI help keep sleepy drivers safe using infrared radiation?
It detects signs of drowsiness and adjusts lighting or sounds an alert to keep the driver awake.
Fill in the blank: Light from the sun is reflected by the ______, allowing us to see it at night.
moon
Riddle: You see me only when light hits me. I’m not the source, just the reflection. What am I?
Non-luminous object
Why are hatchlings drawn away from the sea by city lights?
Artificial light is brighter than the moon
Explain why we can't see our reflection in a rough surface?
Light scatters in many directions
Short Answer: Explain how light pollution affects migratory birds.
Artificial lights disrupt their navigation, causing them to migrate too early or too late.
Fill in the blank: Light travels in straight lines, but on a rough surface, each ray reflects in a ______ direction.
different
Which mirror is used to brighten specimens in microscopes?
Concave
Riddle: I’m made of curved glass or metal. I help drivers see wide angles and dentists zoom in. What am I?
Curved mirror