What is the wavelength range of visible light?

Last Updated: 25 Jun 2026

What is the wavelength range of visible light? Here, the relevant answer is “400-700 nm.” A sound solution relies on the governing concept rather than a memorised option letter, because option order may change in another paper. The distractors in this question—100-400 nm, 700-1000 nm, 200-400 nm—do not satisfy the exact condition stated. The final selection must agree with the explanation and marked answer: 400-700 nm.

A100-400 nm

B400-700 nm

C700-1000 nm

D200-400 nm

Correct Answer: 400-700 nmYour Answer: B

Explanation

— the scientifically appropriate response is 400-700 nm. Option-wise review: 400-700 nm is correct under the condition given in the stem. 100-400 nm is incorrect because it describes a different quantity or phenomenon and does not meet the stated condition. 700-1000 nm is also incorrect; although it may be a valid physics term, its definition or application is not the one asked here. 200-400 nm is incorrect because it fails the governing relation or characteristic relevant to this case. Therefore, option B, 400-700 nm, is factually and logically consistent with the question. Visible light has wavelengths between approximately 400 nm (violet) to 700 nm (red).

Important Notes

Read the complete stem before looking at the options. Identify whether the demand is a definition, unit, formula, direction, cause, effect, image characteristic, or device principle. In this record, the confirmed answer is 400-700 nm.
Eliminate 100-400 nm, 700-1000 nm, 200-400 nm here because none fulfils the exact requirement of the stem. The final answer and correct-index field must point to option B.
Exam memory point: connect 400-700 nm directly with the key wording of the question, then verify it once against the relevant definition or formula before marking the answer.Violet: 400nm Red: 700nm

Test your SSC CGL Physics knowledge

Start Topic Test

FAQ

SSC CGL Physics FAQs

Common questions and clear answers for this topic.

How many physics questions usually appear in the SSC CGL exam?

Physics typically makes up a small portion of the General Science questions, usually focused on concepts rather than numerical problems.

Which physics topics are most important for SSC CGL?

Basic mechanics, heat, sound and light, and electricity and magnetism are the areas that come up most consistently across previous papers.

Do I need to solve numerical problems for SSC CGL physics?

Rarely. Most questions are conceptual and test everyday understanding rather than calculation skills.

Is NCERT physics enough for SSC CGL preparation?

NCERT textbooks from classes 9 and 10 build a strong enough conceptual base for most of what SSC CGL asks.

How can I make physics concepts easier to remember for SSC CGL?

Connecting concepts to everyday observations, like why a thermos keeps tea warm, makes them far easier to recall than memorizing definitions.

Same Topic MCQs

View All

Which phenomenon is responsible for the formation of mirages?What is the formula for gravitational force between two masses?What is the effect of increasing temperature on the speed of sound in air?