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Challenge of the Week
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Next in 4d 12h
EM Spectrum Classification Challenge
Five electromagnetic waves are detected with these wavelengths —
A: 1.5×10-10 m · B: 5.5×10-7 m · C: 3×10-2 m · D: 2×10-9 m · E: 1×10-14 m
Use the simulation to explore the spectrum. Then answer by calculation:
(1) Identify the EM region for each wave (A–E) and name one real-world technology for each.
(2) Calculate the frequency of Wave B using f = c/λ (c = 3×108 m/s). What colour is it?
(3) Calculate energy per photon for Wave B and Wave E using E = hf (h = 6.626×10-34 J·s). Which carries more energy, and by what factor?
Submit as: Regions: A=[region], B=[region]... · fB=[value] Hz · Colour=[colour] · EB=[value] J, EE=[value] J · Factor=[value]
Use the simulation to explore the spectrum. Then answer by calculation:
(1) Identify the EM region for each wave (A–E) and name one real-world technology for each.
(2) Calculate the frequency of Wave B using f = c/λ (c = 3×108 m/s). What colour is it?
(3) Calculate energy per photon for Wave B and Wave E using E = hf (h = 6.626×10-34 J·s). Which carries more energy, and by what factor?
Submit as: Regions: A=[region], B=[region]... · fB=[value] Hz · Colour=[colour] · EB=[value] J, EE=[value] J · Factor=[value]
Click to Launch Simulation
EM Spectrum Explorer
Your Answer
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3D Experiential Robotics Lab
Assemble real robots in 3D, wire circuits, write Arduino code — and watch them move. India's only virtual robotics lab for school students. No login needed to explore.
Obstacle Avoider Robot
Build an Arduino robot with ultrasonic sensor. Wire the L298N motor driver, code the avoidance logic, and watch it dodge walls in real-time 3D.
▶ Launch Lab
Line Follower Robot
Add IR sensors, tune BASE_SPEED and TURN_SPEED defines, and get the robot to follow a black track — a classic control-systems challenge.
▶ Launch Lab
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Robotic Arm
3 servo-driven joints + gripper. Program pick-and-place sequences with inverse kinematics and watch the arm execute in 3D.
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Self Balancing Robot
MPU-6050 IMU + PID controller. Tune Kp, Ki, Kd gains and watch the two-wheeled robot balance itself against gravity.
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Projectile Motion
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