Shadow Formation — Homi Bhabha Exam Physics MCQs with Solutions
Free Homi Bhabha Exam Physics Shadow Formation MCQs with step-by-step solutions (5 questions). Part of Light & Optics. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Shadow Formation · medium · theory
Shadows are formed because light travels:
A. around obstacles
B. in curved paths
C. in straight lines (rectilinear propagation) ✓ Correct
D. faster through opaque objects
Solution: Since light travels in straight lines, an opaque object blocks it and casts a shadow.
Q2 — Shadow Formation · hard · theory
The dark central region of a shadow, where light is completely blocked, is called the:
A. umbra ✓ Correct
B. focus
C. aperture
D. penumbra
Solution: The umbra is the fully dark part; the lighter surrounding region is the penumbra.
Q3 — Shadow Formation · medium · theory
A solar eclipse occurs when:
A. the Sun comes between the Earth and the Moon
B. the Moon comes between the Sun and the Earth ✓ Correct
C. the Earth stops rotating
D. the Earth comes between the Sun and the Moon
Solution: In a solar eclipse the Moon's shadow falls on the Earth, blocking the Sun.
Q4 — Shadow Formation · medium · theory
A lunar eclipse occurs when:
A. the Moon comes between the Sun and the Earth
B. the Sun is blocked by a planet
C. the Earth comes between the Sun and the Moon ✓ Correct
D. the Moon enters the Sun
Solution: In a lunar eclipse the Earth's shadow falls on the Moon.
Q5 — Shadow Formation · hard · theory
A shadow is formed only by an object that is:
A. opaque ✓ Correct
B. translucent
C. transparent
D. luminous
Solution: Opaque objects block light and cast shadows; transparent objects let light pass through.