A. Unchanged B. Halved C. Doubled D. Quadrupled
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A. Frequency B. Wavelength C. Amplitude D. Velocity
A. Energy B. Mass C. Charge D. None of these
A. Reflection B. Refraction C. Total internal reflection D. None of these
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A. Their amplitudes are equal B. Their frequencies are equal C. Their wavelengths are equal D. Their phase difference is constant
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A. Always real B. Always virtual C. Always inverted D. Always enlarged
A. Convex mirror B. Plane mirror C. Concave mirror D. None of these
A. Doppler’s effect B. Special theory of relativity C. Huygen’s wave theory D. None of these
A. Same frequency B. Same intensity C. Same phase D. Same velocity
A. Red B. Blue C. Yellow D. None