Phys CA 2026 Rev | Questions with 100% Verified Answers | Latest Update

Phys CA 2026 Rev | Questions with 100% Verified Answers | Latest Update
Question: Two uses of radio waves?
Answer:
TV communications and MRI scanners

Question: How are radio waves produced?
Answer:
By oscillations in electrical circuits

Question: What are the dangers of radio waves?
Answer:
None

Question: Two uses of microwaves
Answer:
Cooking and satellite transmissions

Question: How are microwaves produced?
Answer:
Transmitted and turned into an electrical system

Question: What are the dangers of microwaves?
Answer:
Internal heating of body tissue but overall safe to use

Question: Uses of Infra-Red
Answer:
Heaters and night vision equipment

Question: How are is infra-red produced
Answer:
Anything emitting temperature

Question: What are the dangers of infrared?
Answer:
Skin burns but usually safe

, Question: Uses of visible light
Answer:
Optical fibres and photography

Question: How is visible light produced?
Answer:
Electrons moving between energy levels in individual atoms

Question: Dangers of visible light
Answer:
blindness, damage to retina but generally safe

Question: Uses of ultraviolet
Answer:
Detects forgery, sun tanning

Question: How is ultraviolet produced?
Answer:
through high-energy processes where atoms are excited

Question: Dangers of X-rays
Answer:
Cell damage, cancers

Question: Uses of X-rays
Answer:
Medical X-rays. CT scans. Airport Security.

Question: How are x-rays produced?
Answer:
Sudden stopping of high speed electrons as they collide with a target

Question: Dangers of gamma rays
Answer:
cancer and genetic mutations

Question: Uses of gamma rays