The colour with maximum wavelength in visible spectrum is MCQ with Answer and Explanation

Question Report Error

The colour with maximum wavelength in visible spectrum is

A. Violet

B. Red

C. Blue

D. Green

Answer: Option B

Solution (By JKExamLibrary)

Red ~700 nm.

This question belongs to: Science Physics

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Practice More Physics Questions

Question #1 Report Error

Wave speed v = 300 m/s, frequency f = 150 Hz. Wavelength λ is:

A. 0.5 m

B. 2 m

C. 150 m

D. 45000 m

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Correct Answer: Option B

Explanation:
v = fλ ⇒ λ = v/f = 300/150 = 2 m. Universal wave equation application. Memory tip: 'λ = v/f; units: m/s ÷ Hz = m'. Basic wave property calculation frequently tested in competitive exams to verify formula application.

This question belongs to: Science Physics

Question #2 Report Error

Assertion (A): In a free fall, a heavy object falls faster than a light object. Reason (R): Acceleration due to gravity is same for all objects.

A. Both A and R true, R is correct explanation

B. A is false, R is true

C. Both A and R true, R not correct explanation

D. A is true, R is false

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Correct Answer: Option B

Explanation:
In vacuum, all objects fall at same rate. A is false. R is true. So C correct.

This question belongs to: Science Physics

Question #3 Report Error

A ship floats because its density is

A. Zero

B. Less than water on average

C. Equal to water

D. Greater than water

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Correct Answer: Option B

Explanation:
Ship is made of steel (density > water) but hollow shape makes average density (including air) less than water. Displaced water weight equals ship's weight, buoyancy holds it up.

This question belongs to: Science Physics

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